APA ציטוט

HELEN NAYLOR. (1996). Essential grammar in use supplementary exercises (0 521 46997 X). Cambridge.

Trích dẫn kiểu Chicago

HELEN NAYLOR. Essential Grammar in Use Supplementary Exercises (0 521 46997 X). Cambridge, 1996.

ציטוט MLA

HELEN NAYLOR. Essential Grammar in Use Supplementary Exercises (0 521 46997 X). Cambridge, 1996.