APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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