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.