STERRETT P W. (1989). MARKETING IDEAS FOR THE SMALL BUSINESS. MERCURY BOOKS.
Lua i Stíl Chicago (17ú heag.)STERRETT P W. MARKETING IDEAS FOR THE SMALL BUSINESS. LONDON: MERCURY BOOKS, 1989.
Lua MLA (9ú heag.)STERRETT P W. MARKETING IDEAS FOR THE SMALL BUSINESS. MERCURY BOOKS, 1989.
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