op. cit.

英 [ɒp sɪt]

美 [ɑːp sɪt]

abbr.  (用于正式文章中，指前文提到的书籍或文章) 同上

Collins.1

牛津词典

abbr.

• （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

柯林斯词典

• （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