Green, P. E. (1970). Research for marketing decisions / P. E. Green [and] Donald S. Tull (2nd ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Green, Paul E. Research for Marketing Decisions / P. E. Green [and] Donald S. Tull. 2nd ed. Englewood Cliffs, N. J: Prentice-Hall, 1970.
Lua MLA (9ú heag.)Green, Paul E. Research for Marketing Decisions / P. E. Green [and] Donald S. Tull. 2nd ed. Prentice-Hall, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.