I want to know if I have cited the same paper more than one time in my research paper, It was going to be counted two citations or only one citation for this paper??
There are many excellent works which are cited several times in a thesis. But at the list of references, the details of this paper will be added only once.
But when you will prepare articles from your research work, say 3 articles, you may refer the same paper in these three article.
After publication of these articles in journals, the author of the article will get three citations.
You will cite the paper by a number or name of the first author or any other styles, when you want to cite it again in the same paper that number or name or style will be repeated exactly the same. It will be counted as one citaction at the end.
A useful device to handle such repeated references is to use Op.cit. You use this abbreviation in an endnote or footnote to refer your reader to a work that you previously cited, saving you from having to repeat the full title of the work. Op. cit. thus concisely refers your reader to your bibliography, where your reader can find the full citation of the work, or to a full citation given in a previous footnote. Thus you do not use Op. cit. on its own but usually with the author's surname, or a brief clue as to which work you are referring to. E.g. Kennedy Op.cit. p. 4.
The citation of a reference is based on the list of references. In that list, each reference is not listed more than once! Therefore, if you cited a reference 100 times within the same article or manuscript, it will be counted as one citation to the reference.
In simple words, one article appearing in references Of one paper get only one citation, it does not matter how many times you referred to it in your paper write up.