Cita APA (7th ed.)
Peterson, W. L. (1974). Principles of Economics: Macro. Irwin.
Cita Chicago (17th ed.)
Peterson, Willis L. Principles of Economics: Macro. London: Irwin, 1974.
Cita MLA (9th ed.)
Peterson, Willis L. Principles of Economics: Macro. Irwin, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.