APA-ийн эшлэл(7 дахь хэвлэлт)

Corder, S. (1971). An intermediate english practice book: Key to the exercises. Longman.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Corder, S.Pit. An Intermediate English Practice Book: Key to the Exercises. London: Longman, 1971.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Corder, S.Pit. An Intermediate English Practice Book: Key to the Exercises. Longman, 1971.