Lua APA (7ú heag.)
Ditzenberger, R., & Kidney, J. (1981). Selling: Helping customers buy. South-Western Pub. Co..
Lua i Stíl Chicago (17ú heag.)
Ditzenberger, Roger, agus John Kidney. Selling: Helping Customers Buy. Cincinnati: South-Western Pub. Co., 1981.
Lua MLA (9ú heag.)
Ditzenberger, Roger, agus John Kidney. Selling: Helping Customers Buy. South-Western Pub. Co., 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.