Cita APA (7a ed.)
Kaufman, P. J. (1978). Commodity trading systems and method. Wiley.
Cita Chicago Style (17a ed.)
Kaufman, Perry J. Commodity Trading Systems and Method. New York: Wiley, 1978.
Cita MLA (9a ed.)
Kaufman, Perry J. Commodity Trading Systems and Method. Wiley, 1978.
Precaución: Estas citas no son 100% exactas.