DAVIDSON W R. (1988). INSTRUCTOR`S MANUAL RETAILING MANAGEMENT (6TH.). JOHN WILEY AND SONS.
Lua i Stíl Chicago (17ú heag.)DAVIDSON W R. INSTRUCTOR`S MANUAL RETAILING MANAGEMENT. 6TH. JOHN WILEY AND SONS, 1988.
Lua MLA (9ú heag.)DAVIDSON W R. INSTRUCTOR`S MANUAL RETAILING MANAGEMENT. 6TH. JOHN WILEY AND SONS, 1988.
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