Παραπομπή APA

Ferguson, C., & Kreps, J. M. (1965). Principles of economics (2nd ed.).

Παραπομπή Chicago Style

Ferguson, C.E, και Juanita M. Kreps. Principles of Economics. 2nd ed. Calcutta, 1965.

Παραπομπή MLA

Ferguson, C.E, και Juanita M. Kreps. Principles of Economics. 2nd ed. 1965.