Gaya APA

GEAR, J., GEAR, R. (2015). CAMBRIDGE PREPARATION FOR THE TOEFL TEST (ED.4). United States of America: CAMBRIDGE UNIVERSITY PRESS.

Gaya MLA

GEAR, JOLENE., GEAR, ROBERT. "CAMBRIDGE PREPARATION FOR THE TOEFL TEST". ED.4 United States of America: CAMBRIDGE UNIVERSITY PRESS, 2015. Text.