Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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