AAker, D. A., & Johnston, M. W. (2003). Churchill ford walkers sales force management. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)AAker, David A., agus Mark W. Johnston. Churchill Ford Walkers Sales Force Management. McGraw-Hill, 2003.
Lua MLA (8ú heag.)AAker, David A., agus Mark W. Johnston. Churchill Ford Walkers Sales Force Management. McGraw-Hill, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.