Gaya APA

Wright, L., Charman, A. (2003). Mengenal Ilmu Unsur Alam: Udara (Ed.2). London: Grolier International.

Gaya MLA

Wright, Lillian., Charman, Andrew. "Mengenal Ilmu Unsur Alam: Udara". Ed.2 London: Grolier International, 2003. Text.