Cita APA (7th ed.)

Lipsey, R. G. (1996). An introduction to positive economics (8th ed.). ELBS; Oxford Univ. Pr.

Cita Chicago (17th ed.)

Lipsey, Richard G. An Introduction to Positive Economics. 8th ed. Oxford: ELBS; Oxford Univ. Pr, 1996.

Cita MLA (9th ed.)

Lipsey, Richard G. An Introduction to Positive Economics. 8th ed. ELBS; Oxford Univ. Pr, 1996.