APA (7th ed.) Citation

Bell, C. E. Encyclopedia of the world's zoos. Fitzroy Dearborn.

Chicago Style (17th ed.) Citation

Bell, Catharine E. Encyclopedia of the World's Zoos. Chigago [u.a.]: Fitzroy Dearborn.

MLA (9th ed.) Citation

Bell, Catharine E. Encyclopedia of the World's Zoos. Fitzroy Dearborn.

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