Tohutoro APA (7th ed.)
Silk, L. S. Contemporary Economics: Principles and Issues. McGraw-Hill.
Tohutoru Kātū Chicago (17th ed.)
Silk, Leonard S. Contemporary Economics: Principles and Issues. Nueva York, EUA: McGraw-Hill.
Tohutoro MLA (9th ed.)
Silk, Leonard S. Contemporary Economics: Principles and Issues. McGraw-Hill.
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