Richert, G. H. (1974). Retailing, principles and practices (6th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Richert, Gottlieb Henry. Retailing, Principles and Practices. 6th ed. New York: McGraw-Hill, 1974.
Lua MLA (9ú heag.)Richert, Gottlieb Henry. Retailing, Principles and Practices. 6th ed. McGraw-Hill, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.