I need to have a copy of the research survey questionnaire used by Frangky Silitonga in his study titled "EFL Students' Ability to Identify Singular and Plural Nouns in Paragraph"
It is not a good idea to use the same questionnaire that has been used in a published work. It is better if you can use the questionnaire as a sample and rewrite your own questionnaire and avoid the issue of plagiarism.