Cita APA (7th ed.)

O' Brien,Derek. (2006). Penguin CRY Quiz Book 1 (NA.). Penguin books.

Cita Chicago (17th ed.)

O' Brien,Derek. Penguin CRY Quiz Book 1. NA. New Delhi: Penguin books, 2006.

Cita MLA (9th ed.)

O' Brien,Derek. Penguin CRY Quiz Book 1. NA. Penguin books, 2006.