Cita APA

Lipsey, R. G. (1971). An Introduction to Positive Economics (3rd ed.). English Language Book Society.

Citación estilo Chicago

Lipsey, Richard G. An Introduction to Positive Economics. 3rd ed. Great Britian: English Language Book Society, 1971.

Cita MLA

Lipsey, Richard G. An Introduction to Positive Economics. 3rd ed. English Language Book Society, 1971.