Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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