SHAPIRO, B. P. (1977). Sales Program Management Formulation And Implementation Benson P. Shapiro. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSHAPIRO, Benson P. Sales Program Management Formulation And Implementation Benson P. Shapiro. McGraw-Hill, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSHAPIRO, Benson P. Sales Program Management Formulation And Implementation Benson P. Shapiro. McGraw-Hill, 1977.
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