Cita APA (7th ed.)

Kohler, H. (1992). Economics. D.C. Heath and Company.

Cita Chicago (17th ed.)

Kohler, Heinz. Economics. Lexington: D.C. Heath and Company, 1992.

Cita MLA (9th ed.)

Kohler, Heinz. Economics. D.C. Heath and Company, 1992.