GREEN, P. E. (1986). Research For Marketing Decisons Paul E. Green, Donald S. Tull. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)GREEN, Paul E. Research For Marketing Decisons Paul E. Green, Donald S. Tull. Prentice-Hall, 1986.
Lua MLA (8ú heag.)GREEN, Paul E. Research For Marketing Decisons Paul E. Green, Donald S. Tull. Prentice-Hall, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.