Edit & Manage Citations

Dear community, 

I am having trouble adding a prefix, suffix or a page to a citation. I’m using the reference author-date which I had to modify a lot. Now if I add a page, a suffix, or a prefix, it simply just doesn’t appear in my word document. Is there any way, anyone could help me? 

I need to cite in footnotes, for ex. like this: Author, Title, Journal, Year, (starting page) and then I would have to add the cited page. 

Thank you very much!