APA (7th ed.) Zitazioa

Lipsey, R. G. (1975). An introduction to positive economics. ELBS, Weidenfeld and Nicolson.

Chicago Style (17th ed.) Zitazioa

Lipsey, Richard G. An Introduction to Positive Economics. London: ELBS, Weidenfeld and Nicolson, 1975.

MLA (9th ed.) Zitazioa

Lipsey, Richard G. An Introduction to Positive Economics. ELBS, Weidenfeld and Nicolson, 1975.