APA način citiranja (7. izdanje)

Posen, M. (2003). Question and Answer Encyclopedia: The natural World. Parragon Publishing.

Čikaški stil citiranja (17. izdanje)

Posen, Michael. Question and Answer Encyclopedia: The Natural World. Bath Bai IHE, Inglaterra: Parragon Publishing, 2003.

MLA način citiranja (9. izdanje)

Posen, Michael. Question and Answer Encyclopedia: The Natural World. Parragon Publishing, 2003.