Gaya APA

Kerrod, R. (1998). Macmillan Revised Encyclopedia of Science Volume 12: Tools and Tomorrow . New York: Macmillan ReferenceUSA.

Gaya MLA

Kerrod, Robin. "Macmillan Revised Encyclopedia of Science Volume 12: Tools and Tomorrow". New York: Macmillan ReferenceUSA, 1998. Text.