Gaya APA

Charman, Andrew. (2001). Bumi . london: Grolier international.

Gaya Chicago

Charman, Andrew. Bumi. london: Grolier international, 2001. Text.

Gaya MLA

Charman, Andrew. Bumi. london: Grolier international, 2001. Text.

Gaya Turabian

Charman, Andrew. Bumi. london: Grolier international, 2001. Print.