APA
Austin O. L., Zim H. S., . (1961). Birds of the world. New York: Golden Press.
Chicago
Austin Oliver L, Zim Herbert S, . 1961. Birds of the world. New York: Golden Press.
Harvard
Austin O. L., Zim H. S., . (1961). Birds of the world. New York: Golden Press.
MLA
Austin Oliver L, Zim Herbert S, . Birds of the world. New York: Golden Press. 1961.
