Ferguson, C., & Kreps, J. M. (1965). Principles of economics (2nd ed.).
Dyfyniad Arddull ChicagoFerguson, C.E, and Juanita M. Kreps. Principles of Economics. 2nd ed. Calcutta, 1965.
Dyfyniad MLAFerguson, C.E, and Juanita M. Kreps. Principles of Economics. 2nd ed. 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.