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