APA ציטוט

Lipsey, R. G. (1963). introduction to positive economics (3rd ed.). English Language Book Society.

Chicago Edition Citation

Lipsey, Richard G. Introduction to Positive Economics. 3rd ed. London: English Language Book Society, 1963.

ציטוט MLA

Lipsey, Richard G. Introduction to Positive Economics. 3rd ed. English Language Book Society, 1963.