APA (7th ed.) Zitazioa

Pfefferbaum, R. (1987). Economics: Study guide (2nd ed.). Houghton Mifflin.

Chicago Style (17th ed.) Zitazioa

Pfefferbaum, Rose. Economics: Study Guide. 2nd ed. Boston: Houghton Mifflin, 1987.

MLA (9th ed.) Zitazioa

Pfefferbaum, Rose. Economics: Study Guide. 2nd ed. Houghton Mifflin, 1987.