Gaya APA

GEOGRAPHIC, N. (2008). NATIONAL GEOGRAPHIC INDONESIA: DI BAWAH BAYANG-BAYANG DARWIN, ALFRED RUSSEL WALLACE . Indonesia: National Geographic.

Gaya MLA

GEOGRAPHIC, NATIONAL. "NATIONAL GEOGRAPHIC INDONESIA: DI BAWAH BAYANG-BAYANG DARWIN, ALFRED RUSSEL WALLACE". Indonesia: National Geographic, 2008. Text.