APA (7th ed.) Citation
Ruffin, R. j., & Gregory, P. R. (1983). Principles of macroeconomics. Scott, Foresman.
Chicago Style (17th ed.) Citation
Ruffin, Roy j., and Paul R. Gregory. Principles of Macroeconomics. Glenview, Illinois: Scott, Foresman, 1983.
MLA (9th ed.) Citation
Ruffin, Roy j., and Paul R. Gregory. Principles of Macroeconomics. Scott, Foresman, 1983.
Warning: These citations may not always be 100% accurate.