APA ציטוט

O'Brien, D. (2006). The penguin India reference year book 2007. Penguin.

Chicago Edition Citation

O'Brien, Derek. The Penguin India Reference Year Book 2007. New Delhi: Penguin, 2006.

ציטוט MLA

O'Brien, Derek. The Penguin India Reference Year Book 2007. Penguin, 2006.