Smykay, E. W., & Breibart, J. (1971). Introductory marketing: A programmed approach. Macmillan.
Lua i Stíl Chicago (17ú heag.)Smykay, Edward W., agus Joan Breibart. Introductory Marketing: A Programmed Approach. New York: Macmillan, 1971.
Lua MLA (9ú heag.)Smykay, Edward W., agus Joan Breibart. Introductory Marketing: A Programmed Approach. Macmillan, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.