Piper, R. (2011). Pests: A guide to the world's most maligned, yet misunderstood creatures. Greenwood.
Chicago-referens (17:e uppl.)Piper, Ross. Pests: A Guide to the World's Most Maligned, yet Misunderstood Creatures. Santa Barbara, Calif.: Greenwood, 2011.
MLA-referens (9:e uppl.)Piper, Ross. Pests: A Guide to the World's Most Maligned, yet Misunderstood Creatures. Greenwood, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.