APA
Russon A. E., . (2000). Orangutans. Buffalo: Firefly Books.
Chicago
Russon Anne E, . 2000. Orangutans. Buffalo: Firefly Books.
Harvard
Russon A. E., . (2000). Orangutans. Buffalo: Firefly Books.
MLA
Russon Anne E, . Orangutans. Buffalo: Firefly Books. 2000.