Cita APA (7th ed.)

Smykay, E. W., & Breibart, J. (1971). Introductory marketing: A programmed approach. Macmillan.

Cita Chicago (17th ed.)

Smykay, Edward W., i Joan Breibart. Introductory Marketing: A Programmed Approach. New York: Macmillan, 1971.

Cita MLA (9th ed.)

Smykay, Edward W., i Joan Breibart. Introductory Marketing: A Programmed Approach. Macmillan, 1971.