Cita APA (7a ed.)
Henderson, V. J., & Poole, W. (1991). Principles of Economics. D.C.Heath and Company.
Cita Chicago Style (17a ed.)
Henderson, Vernon J., y William Poole. Principles of Economics. Toronto: D.C.Heath and Company, 1991.
Cita MLA (9a ed.)
Henderson, Vernon J., y William Poole. Principles of Economics. D.C.Heath and Company, 1991.
Precaución: Estas citas no son 100% exactas.