Gaya APA
Diamond, J.
(2013).
Guns, Germs & Steel ( Bedil, Kuman & Baja )
.
Jakarta:
Kpg.
Gaya MLA
Diamond, Jared.
"Guns, Germs & Steel ( Bedil, Kuman & Baja )".
Jakarta:
Kpg,
2013.
Text.