APA (7th ed.) Zitazioa

Lipsey, R. G. (1995). An Introduction to positive economics (8th ed.). Univ. Pr.

Chicago Style (17th ed.) Zitazioa

Lipsey, Richard G. An Introduction to Positive Economics. 8th ed. Oxford: Univ. Pr, 1995.

MLA (9th ed.) Zitazioa

Lipsey, Richard G. An Introduction to Positive Economics. 8th ed. Univ. Pr, 1995.