Cita APA (7a ed.)

WATCYN-JONES, P. (1986). Test your vocabulary book 4. Penguin Books.

Cita Chicago Style (17a ed.)

WATCYN-JONES, Peter. Test Your Vocabulary Book 4. Harmonsworth: Penguin Books, 1986.

Cita MLA (9a ed.)

WATCYN-JONES, Peter. Test Your Vocabulary Book 4. Penguin Books, 1986.