Green, P. E. (1970). Research for marketing decisions / P. E. Green [and] Donald S. Tull (2nd ed.). Prentice-Hall.
Cita Chicago (17th ed.)Green, Paul E. Research for Marketing Decisions / P. E. Green [and] Donald S. Tull. 2nd ed. Englewood Cliffs, N. J: Prentice-Hall, 1970.
Cita MLA (9th ed.)Green, Paul E. Research for Marketing Decisions / P. E. Green [and] Donald S. Tull. 2nd ed. Prentice-Hall, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.