APA (7e ed.) Bronvermelding
Ikerd, J. E. (2012). The essentials of economic sustainability. Kumarian Press.
Chicago (17e ed.) Bronvermelding
Ikerd, John E. The Essentials of Economic Sustainability. Sterling, Va.: Kumarian Press, 2012.
MLA (9e ed.) Bronvermelding
Ikerd, John E. The Essentials of Economic Sustainability. Kumarian Press, 2012.
Let op: Deze citaties zijn niet altijd 100% accuraat.