op. cit. /ˈɒp ˌsɪt/

• 1. 

  In reference books, op. cit. is used after an author's name to refer to a book of theirs which has already been mentioned. 见前引书 [正式]

  例：

  ...quoted in Iyer, op. cit., p. 332.

  …引自伊耶，见前引书332页。