Lua APA (7ú heag.)

RUFFIN, R. J., & GREGORY, P. R. (1988). Principles of microeconomics.-- Ed.3. Scott.

Lua i Stíl Chicago (17ú heag.)

RUFFIN, Roy J., agus Paul R. GREGORY. Principles of Microeconomics.-- Ed.3. Boston: Scott, 1988.

Lua MLA (9ú heag.)

RUFFIN, Roy J., agus Paul R. GREGORY. Principles of Microeconomics.-- Ed.3. Scott, 1988.

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