Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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