GREEN, P. E. Research For Marketing Decisions. s.n.
Lua i Stíl Chicago (17ú heag.)GREEN, Paul E. Research For Marketing Decisions. s.n.
Lua MLA (8ú heag.)GREEN, Paul E. Research For Marketing Decisions. s.n.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.