Cita APA (7th ed.)

Lipsey, R. G., Steiner, O., & Purvis, D. (1990). Economics (9th ed.). Harper & Row.

Cita Chicago (17th ed.)

Lipsey, Richard G., O. Steiner, i Douglas Purvis. Economics. 9th ed. New York: Harper & Row, 1990.

Cita MLA (9th ed.)

Lipsey, Richard G., et al. Economics. 9th ed. Harper & Row, 1990.