Gaya APA

Case, K, E., Fair, R, C. (1996). Principles of Microeconomics 4th Ed (4th Ed). United Stated of America: Prentice Hall.

Gaya MLA

Case, Karl, E., Fair, Ray, C. "Principles of Microeconomics 4th Ed". 4th Ed United Stated of America: Prentice Hall, 1996. Text.