APA (7th ed.) Citation

Allen, G. R. (1981). Cockatiel handbook. T.F.H.Publications,Inc.Ltd..

Chicago Style (17th ed.) Citation

Allen, Gerald R. Cockatiel Handbook. New Jersey: T.F.H.Publications,Inc.Ltd., 1981.

MLA (9th ed.) Citation

Allen, Gerald R. Cockatiel Handbook. T.F.H.Publications,Inc.Ltd., 1981.

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