EZELL HAZEL F. (1987). MARKETING PRINCIPLES AND STRATEGY. BUSINESS PUBLICATION.
Lua i Stíl Chicago (17ú heag.)EZELL HAZEL F. MARKETING PRINCIPLES AND STRATEGY. PLANO: BUSINESS PUBLICATION, 1987.
Lua MLA (9ú heag.)EZELL HAZEL F. MARKETING PRINCIPLES AND STRATEGY. BUSINESS PUBLICATION, 1987.
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