Παραπομπή σε μορφή APA (7η εκδ.)

Naylor, H., & Murphy, R. (1997). Essential grammar in use supplementary exercises: With answers. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Naylor, Helen, και Raymond Murphy. Essential Grammar in Use Supplementary Exercises: With Answers. Cambridge: Cambridge University Press, 1997.

Παραπομπή σε μορφή MLA (8th εκδ.)

Naylor, Helen, και Raymond Murphy. Essential Grammar in Use Supplementary Exercises: With Answers. Cambridge University Press, 1997.