Cita APA (7a ed.)

Emory, W., & Cooper, D. R. (1991). Business research methods (4th ed.). Irwin.

Cita Chicago Style (17a ed.)

Emory, William, y Donald R. Cooper. Business Research Methods. 4th ed. Homewood, Ill: Irwin, 1991.

Cita MLA (9a ed.)

Emory, William, y Donald R. Cooper. Business Research Methods. 4th ed. Irwin, 1991.