Gaya APA
Slikkerveer, R, E, L, D, L, J. et al
(1995).
Pithecanthropus
.
Nederland:
Chevalier Holland Printers.
Gaya MLA
Slikkerveer, Richard, E., Leakey, Dan, L., Jan. et al.
"Pithecanthropus".
Nederland:
Chevalier Holland Printers,
1995.
Text.