Cita APA (7th ed.)

Lipsey, R. G. (1966). An introduction to positive economics (2nd ed.). Weidenfeld & Nicolson.

Cita Chicago (17th ed.)

Lipsey, Richard G. An Introduction to Positive Economics. 2nd ed. London: Weidenfeld & Nicolson, 1966.

Cita MLA (8th ed.)

Lipsey, Richard G. An Introduction to Positive Economics. 2nd ed. Weidenfeld & Nicolson, 1966.