Cita APA (7th ed.)

Gemmill, P. F. (1943). Fundamentals of economics (Fourth edition.). Harper.

Cita Chicago (17th ed.)

Gemmill, Paul F. Fundamentals of Economics. Fourth edition. New York: Harper, 1943.

Cita MLA (9th ed.)

Gemmill, Paul F. Fundamentals of Economics. Fourth edition. Harper, 1943.