Gaya APA
Hamburg, D, A., McCown, E, R. (1979).
The Great Apes .
California:
The Bunjamin:cummings Publishing Company.
Gaya MLA
Hamburg, David, A.., McCown, Elizabeth, R..
"The Great Apes".
California:
The Bunjamin:cummings Publishing Company,
1979.
teks.