Gaya APA

GOWER, R. (2002). GRAMMAR IN PRACTICE 1: 40 UNITS OF SELF-STUDY GRAMMAR EXERCISES (CET.11). United Kingdom: CAMBRIDGE UNIVERSITY PRESS.

Gaya MLA

GOWER, RODER. "GRAMMAR IN PRACTICE 1: 40 UNITS OF SELF-STUDY GRAMMAR EXERCISES". CET.11 United Kingdom: CAMBRIDGE UNIVERSITY PRESS, 2002. Text.