Cita APA (7th ed.)

ALLSOP, J. (1988). Penguin english tests book 3. Penguin Books.

Cita Chicago (17th ed.)

ALLSOP, Jake. Penguin English Tests Book 3. London: Penguin Books, 1988.

Cita MLA (9th ed.)

ALLSOP, Jake. Penguin English Tests Book 3. Penguin Books, 1988.