Gaya APA

Kerrod, R. (1998). Macmillan Revised Encyclopedia of Science Volume 2: The Heavens . New York: Macmillan ReferenceUSA.

Gaya MLA

Kerrod, Robin. "Macmillan Revised Encyclopedia of Science Volume 2: The Heavens". New York: Macmillan ReferenceUSA, 1998. Text.