Παραπομπή σε μορφή APA (7η εκδ.)

Murphy, R. (1990). Essential grammar in use: A self-study reference and practice book for elementary students of english. Cambridge university press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Murphy, Raymond. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English. Cambridge: Cambridge university press, 1990.

Παραπομπή σε μορφή MLA (8th εκδ.)

Murphy, Raymond. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English. Cambridge university press, 1990.