Cita APA (7a ed.)

Lipsey, R. G. (1999). Principles of economics (9th ed.). Univ. Pr.

Cita Chicago Style (17a ed.)

Lipsey, Richard G. Principles of Economics. 9th ed. Oxford: Univ. Pr, 1999.

Cita MLA (9a ed.)

Lipsey, Richard G. Principles of Economics. 9th ed. Univ. Pr, 1999.