Dear Amir, I am afraid, your publisher will reject such a manuscript containing another paper as an appendix. Sometimes It is useful to duplicate in appendix some big figures and tables from your previous papers. But you must be careful with terms of your 'author agreements' in that case.

While writing the article you simply refer to some sections of your article provided you provide the in-text reference. I do not think you should include all the article in the appendix.

Regards

An Appendix should NOT include a full article. Rather, typically an Appendix provides supplementary materials to the article to which is is appended. These supplements could range anywhere from raw data, processed data, additional estimations related to those in the text of the article, and so forth. Arguably, an Appendix could also include supplemetary readings related to the article topic or even a list of future extensions/research topics for interested researchers to extend the investigation upon which the articel is focused.

These same guidelines would likely apply to an Appendix to a book chapter, although one might well debote more space to providing the supplementary materials.

I totally agree with Richard Cebula. You should not a full article in the appendix.

The appendix is an instrument to put statistical information and methods, additional to he main text. At least in economics.

While writing a paper we usually put additional and relevant information in appendix. If a full paper is relevant to the article it can be added with complete citation in the reference section of the paper so that reader may consult the same if he finds it important and interesting.

Giving full text of a particular paper in appendix would not only be improper but also cumbersome to the reader, as he may have difficulty in deciding which one to read first, and may wonder why at all it has been added, in appendix, when it could have/ has been published separately.

The appendix includes the any questionnaires, interview schedule used for the survey, methods of analysis of any analysis done, ethical approval letter..

Dear Amir, I am afraid, your publisher will reject such a manuscript containing another paper as an appendix. Sometimes It is useful to duplicate in appendix some big figures and tables from your previous papers. But you must be careful with terms of your 'author agreements' in that case.

In my opinion, an appendix should contain a demonstration of some results, or something can a reader can skip initially. I always read appendices with these properties.

I do not think it is appropriate to include an article in the appendix section. Supplementary data from primary and secondary sources and instruments used in data collection can form part of your appendix.

As Hussein previously mentioned, you can simply cite your other paper. Although self-referencing is a common practice in research, i don't know why some researcher opt not to use it !! Self-referencing is the answer to your question as it will also help in self-promotion. Remember, you don't want to say again subtopics you have already dealt with extensively in your previous work.

Self-referencing is a social behaviour. Some people are so modest they do not want to promote themselves. Also, we need to cite other people's works as much as we can to support our own work. There is a rich body of literature out there, some of them are even unexplored, so why not use them more?

I agree with Mary Rose. Also, some journals may classify self referencing as a negative act if done extensively. So, one can be moderate in that and support one's research with others' work.