APA (7 वां संस्करण) प्रशस्ति पत्र

ASHWATHAPPA K. (1996). ESSENTIAL OF BUSINESS ENVIRONMENT (4TH.). HPH.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

ASHWATHAPPA K. ESSENTIAL OF BUSINESS ENVIRONMENT. 4TH. MUMBAI: HPH, 1996.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

ASHWATHAPPA K. ESSENTIAL OF BUSINESS ENVIRONMENT. 4TH. HPH, 1996.