D.Lee, D. .. (1984). Industrial marketing research: Techniques & practices (2nd ed.). Van Nostrand Reinhold.
Cita Chicago (17th ed.)D.Lee, Donald .. Industrial Marketing Research: Techniques & Practices. 2nd ed. New York: Van Nostrand Reinhold, 1984.
Cita MLA (9th ed.)D.Lee, Donald .. Industrial Marketing Research: Techniques & Practices. 2nd ed. Van Nostrand Reinhold, 1984.