APA

Gower (Roger), . (79). Grammar in Practice-6 (40 Units of Self-Study Grammar Exercises). : Cambridge University Press.

Chicago

Gower (Roger), . 79. Grammar in Practice-6 (40 Units of Self-Study Grammar Exercises). : Cambridge University Press.

Harvard

Gower (Roger), . (79). Grammar in Practice-6 (40 Units of Self-Study Grammar Exercises). : Cambridge University Press.

MLA

Gower (Roger), . Grammar in Practice-6 (40 Units of Self-Study Grammar Exercises). : Cambridge University Press. 79.