Tohutoro APA (7th ed.)
Ruffin, R. j., & Gregory, P. R. (1986). Principles of macroeconomics (2nd ed.). Scott, Foresman.
Tohutoru Kātū Chicago (17th ed.)
Ruffin, Roy j., me Paul R. Gregory. Principles of Macroeconomics. 2nd ed. Glenview, Illinois: Scott, Foresman, 1986.
Tohutoro MLA (9th ed.)
Ruffin, Roy j., me Paul R. Gregory. Principles of Macroeconomics. 2nd ed. Scott, Foresman, 1986.
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