Gaya APA

Lerner, B, W., Lerner, K, L. (2009). Environmental Science : in context Vol 1 dan 2 (vol. 1 & 2). Detroit: GALE Cengage Learning.

Gaya MLA

Lerner, Brenda, Wilmoth., Lerner, K., Lee. "Environmental Science : in context Vol 1 dan 2". vol. 1 & 2 Detroit: GALE Cengage Learning, 2009. ML.