APA (7th ed.) Citation

Bruun, B., & Singer, A. (1971). Birds of Europe. Golden Press.

Chicago Style (17th ed.) Citation

Bruun, Bertel, and Arthur Singer. Birds of Europe. New York: Golden Press, 1971.

MLA (9th ed.) Citation

Bruun, Bertel, and Arthur Singer. Birds of Europe. Golden Press, 1971.