Cita APA (7a ed.)

Gemmill, P. F. (1949). Fundamentals of economics (5th ed.). Harper.

Cita Chicago Style (17a ed.)

Gemmill, Paul F. Fundamentals of Economics. 5th ed. New York: Harper, 1949.

Cita MLA (9a ed.)

Gemmill, Paul F. Fundamentals of Economics. 5th ed. Harper, 1949.