Παραπομπή APA

Ferguson, C. E., & Kreps, J. M. (1968). Principles of economics. Oxford IBH.

Παραπομπή Chicago Style

Ferguson, C E., και Juanita M. Kreps. Principles of Economics. Calcutta: Oxford IBH, 1968.

Παραπομπή MLA

Ferguson, C E., και Juanita M. Kreps. Principles of Economics. Oxford IBH, 1968.