Duplicate references in word

Hello please help!

attached is a file showing the problem.
Does anyone know how to solve this problem?
https://s3.amazonaws.com/zotero.org/images/forums/u7434487/0riaxpfmhk7w2wf1vdb2.jpg

Thank you,
CemĀ 
  • What is the style you are using? Is it in a new, empty document? Are you sure "Cao et al." are the same item in your library (and not duplicates)?
  • Hello Poettli,

    the style is American Chemical Society. It is in a new empty document.
    The reference "Coa et al." is the same item in my library, as I picked it from the already cited item from the options that popped up.


  • This is not American Chemical Society (not even close); it's a footnote style, likely Chicago (Note). You select a citation style for your document in the ZOtero Document prefences in Word.
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