APA (7th ed.) Citation

(2007). Extraterrestrial life. Library of Congress, Science, Technology & Business Division, Science Reference Services.

Chicago Style (17th ed.) Citation

Extraterrestrial Life. [Washington, D.C.]: Library of Congress, Science, Technology & Business Division, Science Reference Services, 2007.

MLA (9th ed.) Citation

Extraterrestrial Life. Library of Congress, Science, Technology & Business Division, Science Reference Services, 2007.