APA (7th ed.) Citation

Sunbird. (2010). The awesome official guide to Club Penguin. Sunbird.

Chicago Style (17th ed.) Citation

Sunbird. The Awesome Official Guide to Club Penguin. London: Sunbird, 2010.

MLA (9th ed.) Citation

Sunbird. The Awesome Official Guide to Club Penguin. Sunbird, 2010.

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