Tohutoro APA (7th ed.)
Froyen, R. T., & Greer, D. F. (1989). Principles of Economics. MaCmillan publ. Co..
Tohutoru Kātū Chicago (17th ed.)
Froyen, Richard T., me Douglas F. Greer. Principles of Economics. London: MaCmillan publ. Co., 1989.
Tohutoro MLA (9th ed.)
Froyen, Richard T., me Douglas F. Greer. Principles of Economics. MaCmillan publ. Co., 1989.
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