Gaya APA

TWIST, C. (1997). Encyclopedia of SciencE 7 The Environment (ed 2 Januari 1997). New York: Macmillan Library Reference.

Gaya MLA

TWIST, CLINT. "Encyclopedia of SciencE 7 The Environment". ed 2 Januari 1997 New York: Macmillan Library Reference, 1997. Text.