Cita APA (7th ed.)
Peterson, W. L. (1977). Principles of Economics: Micro (3thd ed.). Irwin.
Cita Chicago (17th ed.)
Peterson, Willis L. Principles of Economics: Micro. 3thd ed. Illinois: Irwin, 1977.
Cita MLA (9th ed.)
Peterson, Willis L. Principles of Economics: Micro. 3thd ed. Irwin, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.