Cita APA (7th ed.)
Armstrong, F. C. (1985). The business of economics. West Pub. Co..
Cita Chicago (17th ed.)
Armstrong, Fred C. The Business of Economics. St. Paul: West Pub. Co., 1985.
Cita MLA (9th ed.)
Armstrong, Fred C. The Business of Economics. West Pub. Co., 1985.
Atenció: Aquestes cites poden no estar 100% correctes.