(2001). Marketing / Michael J. Etzek; Bruce J. Walker And William J. Stanton. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Marketing / Michael J. Etzek; Bruce J. Walker And William J. Stanton. McGraw-Hill, 2001.
Lua MLA (8ú heag.)Marketing / Michael J. Etzek; Bruce J. Walker And William J. Stanton. McGraw-Hill, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.