APA (7e ed.) Bronvermelding
Botkin, D. B., & Keller, E. A. (2012). Environmental science: International student version (8th ed.). John Wiley & Sons.
Chicago (17e ed.) Bronvermelding
Botkin, Daniel B., en Edward A. Keller. Environmental Science: International Student Version. 8th ed. New Delhi: John Wiley & Sons, 2012.
MLA (9e ed.) Bronvermelding
Botkin, Daniel B., en Edward A. Keller. Environmental Science: International Student Version. 8th ed. John Wiley & Sons, 2012.
Let op: Deze citaties zijn niet altijd 100% accuraat.