Gaya APA

Leakey, Richard E.. (1978). Origins . New York: .

Gaya Chicago

Leakey, Richard E.. Origins. New York: , 1978. Text.

Gaya MLA

Leakey, Richard E.. Origins. New York: , 1978. Text.

Gaya Turabian

Leakey, Richard E.. Origins. New York: , 1978. Print.