Cita APA (7a ed.)

Watcyn-Jones, P. Pair work one: Student A + student B. Penguin Books.

Cita Chicago Style (17a ed.)

Watcyn-Jones, Peter. Pair Work One: Student A + Student B. London: Penguin Books.

Cita MLA (9a ed.)

Watcyn-Jones, Peter. Pair Work One: Student A + Student B. Penguin Books.