Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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