APA (7th ed.) Zitazioa
Bingham, R. C., & Walstad, W. B. (1990). Economic concepts: A programmed approach (9th ed.). McGraw-Hill, Inc..
Chicago Style (17th ed.) Zitazioa
Bingham, Robert C., eta William B. Walstad. Economic Concepts: A Programmed Approach. 9th ed. New York: McGraw-Hill, Inc., 1990.
MLA (9th ed.) Zitazioa
Bingham, Robert C., eta William B. Walstad. Economic Concepts: A Programmed Approach. 9th ed. McGraw-Hill, Inc., 1990.
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