Cita APA (7th ed.)

SLAVIN, S. L. (1991). Introduction to economics.-- Ed. 2. Irwin.

Cita Chicago (17th ed.)

SLAVIN, Stepen L. Introduction to Economics.-- Ed. 2. Homewood: Irwin, 1991.

Cita MLA (9th ed.)

SLAVIN, Stepen L. Introduction to Economics.-- Ed. 2. Irwin, 1991.