Gaya APA

Dunia Alami. (2006). : Quality Press.

Gaya Chicago

Dunia Alami. . : Quality Press, 2006. Non-fiction.

Gaya MLA

Dunia Alami. . : Quality Press, 2006. Non-fiction.

Gaya Turabian

Dunia Alami. : Quality Press, 2006. Non-fiction.