Wrenn, B., & Kotler, P. (1984). Instructor's manual Marketing management: Analysis, planning, and control (5a. ed.). Prentice-Hall.
Citace podle Chicago (17th ed.)Wrenn, Bruce, a Philip Kotler. Instructor's Manual Marketing Management: Analysis, Planning, and Control. 5a. ed. Englewood Cliffs: Prentice-Hall, 1984.
Citace podle MLA (9th ed.)Wrenn, Bruce, a Philip Kotler. Instructor's Manual Marketing Management: Analysis, Planning, and Control. 5a. ed. Prentice-Hall, 1984.
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