APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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