Gaya APA

Gunther, W, D., sOMMERS, P. (1991). Instructor's manual and test item file for Edwin Mansfield's : microeconomics theory and applications . New York: W.W. Norton & Company.

Gaya MLA

Gunther, William, D., sOMMERS, PAUL. "Instructor's manual and test item file for Edwin Mansfield's : microeconomics theory and applications". New York: W.W. Norton & Company, 1991. Text.