APA (7 वां संस्करण) प्रशस्ति पत्र

HARVARD BUSINESS REVIEW. (1973). HOW TO IMPROVE SALES MANAGEMENT. HARVARD BUS. SCHOOL.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

HARVARD BUSINESS REVIEW. HOW TO IMPROVE SALES MANAGEMENT. USA: HARVARD BUS. SCHOOL, 1973.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

HARVARD BUSINESS REVIEW. HOW TO IMPROVE SALES MANAGEMENT. HARVARD BUS. SCHOOL, 1973.