Kelley, E. J. (1972). Marketing planning and competitve strategy. Prentice Hall, Inc.
Dyfyniad Arddull ChicagoKelley, Eugene J. Marketing Planning and Competitve Strategy. New Jersey: Prentice Hall, Inc, 1972.
Dyfyniad MLAKelley, Eugene J. Marketing Planning and Competitve Strategy. Prentice Hall, Inc, 1972.
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