op. cit.

abbr.

1. （用于正式文章中，指前文提到的书籍或文章） 同上
   used in formal writing to refer to a book or an article that has already been mentioned

1. （置于作者姓名后，指前文已提到的著作）见前引书，同前引
   In reference books, op. cit. is used after an author's name to refer to a book of theirs which has already been mentioned.
   1. ...quoted in Iyer, op. cit., p. 332.
      引自伊耶（同上），332页