Cita APA

Ferguson, C. E., & Vaish, M. C. (1962). Principles of economics. Duke University.

Citación estilo Chicago

Ferguson, C. E., y M. C. Vaish. Principles of Economics. USA: Duke University, 1962.

Cita MLA

Ferguson, C. E., y M. C. Vaish. Principles of Economics. Duke University, 1962.