SHAPIRO, B. P. (1977). Sales Program Management Formulation And Implementation Benson P. Shapiro. McGraw-Hill.
Citace podle Chicago (17th ed.)SHAPIRO, Benson P. Sales Program Management Formulation And Implementation Benson P. Shapiro. McGraw-Hill, 1977.
Citace podle MLA (8th ed.)SHAPIRO, Benson P. Sales Program Management Formulation And Implementation Benson P. Shapiro. McGraw-Hill, 1977.
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