Cita APA (7th ed.)
Ikerd, J. E. (2012). The essentials of economic sustainability. Kumarian Press.
Cita Chicago (17th ed.)
Ikerd, John E. The Essentials of Economic Sustainability. Sterling, Va.: Kumarian Press, 2012.
Cita MLA (9th ed.)
Ikerd, John E. The Essentials of Economic Sustainability. Kumarian Press, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.