Gaya APA
LEAKEY, R, E., SLIKKERVEER, L, J.
(1995).
Pithecanthropuss
.
Neherland:
Richard Leakey Foundation.
Gaya MLA
LEAKEY, Richard, E.., SLIKKERVEER, L., Jan.
"Pithecanthropuss".
Neherland:
Richard Leakey Foundation,
1995.
Buku.