APA (7th ed.) Zitazioa
Bowden, E. V., & Bowden, J. H. (1981). Principles of economics: Theory. problems. policies (3rd ed.). South-western.
Chicago Style (17th ed.) Zitazioa
Bowden, Elbert V., eta Judith H. Bowden. Principles of Economics: Theory. Problems. Policies. 3rd ed. Ohio: South-western, 1981.
MLA (9th ed.) Zitazioa
Bowden, Elbert V., eta Judith H. Bowden. Principles of Economics: Theory. Problems. Policies. 3rd ed. South-western, 1981.
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