APA Citation

Voous, K. H., & Cameron, A. (1990). Owls of the Northern Hemisphere. Londres: Collins.

Chicago Style Citation

Voous, Karen H., and Ad Cameron. Owls of the Northern Hemisphere. Londres: Collins, 1990.

MLA Citation

Voous, Karen H., and Ad Cameron. Owls of the Northern Hemisphere. Londres: Collins, 1990.

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