Cita APA

Ferguson, C., & Freps, J. M. (1965). Principles of economics. New York: Holt, Rinehart and Winston.

Chicago Style Citation

Ferguson, C.E., i Juanita M. Freps. Principles of Economics. New York: Holt, Rinehart and Winston, 1965.

Cita MLA

Ferguson, C.E., i Juanita M. Freps. Principles of Economics. New York: Holt, Rinehart and Winston, 1965.