APA

Austin O. L., Zim H., . (1975). Birds of the world. London: Hamlyn.

Chicago

Austin Oliver L, Zim Herberts, . 1975. Birds of the world. London: Hamlyn.

Harvard

Austin O. L., Zim H., . (1975). Birds of the world. London: Hamlyn.

MLA

Austin Oliver L, Zim Herberts, . Birds of the world. London: Hamlyn. 1975.