Gaya APA

Twist, C. (1998). Macmillan Revised Encyclopedia of Science Volume 4: Life on Earth . New York: Macmillan ReferenceUSA.

Gaya MLA

Twist, Clint. "Macmillan Revised Encyclopedia of Science Volume 4: Life on Earth". New York: Macmillan ReferenceUSA, 1998. Text.