APA (7th ed.) Citation

Lipsey, R. G., & Chrystal, K. A. (1995). An introduction to positive economics (8th ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Lipsey, Richard G., and K. Alec Chrystal. An Introduction to Positive Economics. 8th ed. Oxford: Oxford University Press, 1995.

MLA (9th ed.) Citation

Lipsey, Richard G., and K. Alec Chrystal. An Introduction to Positive Economics. 8th ed. Oxford University Press, 1995.