APA (7th ed.) Citation

Austin, O. L., & Singer, A. (1975). Birds of the World: A survey of the twenty-seven orders and one hundred and fifty-five families (11. impr.). Hamlyn.

Chicago Style (17th ed.) Citation

Austin, Oliver L., and Arthur Singer. Birds of the World: A Survey of the Twenty-seven Orders and One Hundred and Fifty-five Families. 11. impr. London: Hamlyn, 1975.

MLA (9th ed.) Citation

Austin, Oliver L., and Arthur Singer. Birds of the World: A Survey of the Twenty-seven Orders and One Hundred and Fifty-five Families. 11. impr. Hamlyn, 1975.