Charters, W. W. (1922). How to sell at retail. Houghton Mifflin Co..
Lua i Stíl Chicago (17ú heag.)Charters, W. W. How to Sell at Retail. Boston : New York: Houghton Mifflin Co., 1922.
Lua MLA (8ú heag.)Charters, W. W. How to Sell at Retail. Houghton Mifflin Co., 1922.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.