APA (7th ed.) Citation

(2003). Perils past and present: Major threats to birds over time. [U.S. Fish & Wildlife Service].

Chicago Style (17th ed.) Citation

Perils Past and Present: Major Threats to Birds over Time. [Washington, D.C.]: [U.S. Fish & Wildlife Service], 2003.

MLA (9th ed.) Citation

Perils Past and Present: Major Threats to Birds over Time. [U.S. Fish & Wildlife Service], 2003.