APA (7th ed.) Citation

Cawthorne, N. (2002). The World's greatest: Alien encounters. Octopus Publishing Group Ltd..

Chicago Style (17th ed.) Citation

Cawthorne, Nigel. The World's Greatest: Alien Encounters. London: Octopus Publishing Group Ltd., 2002.

MLA (9th ed.) Citation

Cawthorne, Nigel. The World's Greatest: Alien Encounters. Octopus Publishing Group Ltd., 2002.

Warning: These citations may not always be 100% accurate.