APA (7th ed.) Citation

Lipsey, R. G. (1965). An introduction to positive economics. English Language Book Society.

Chicago Style (17th ed.) Citation

Lipsey, Richard G. An Introduction to Positive Economics. English Language Book Society, 1965.

MLA (9th ed.) Citation

Lipsey, Richard G. An Introduction to Positive Economics. English Language Book Society, 1965.

Warning: These citations may not always be 100% accurate.