Cita APA (7th ed.)

Wonnacott, P., & Wonnacott, R. J. (1990). Economics (4th.ed.). John Wiley & sons.

Cita Chicago (17th ed.)

Wonnacott, Paul, i Ronald J. Wonnacott. Economics. 4th.ed. New York: John Wiley & sons, 1990.

Cita MLA (9th ed.)

Wonnacott, Paul, i Ronald J. Wonnacott. Economics. 4th.ed. John Wiley & sons, 1990.