APA (7 वां संस्करण) प्रशस्ति पत्र

Harvard Business School. (2008). Going Green. HArvard Bus.School Pub.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Harvard Business School. Going Green. Boston: HArvard Bus.School Pub, 2008.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Harvard Business School. Going Green. HArvard Bus.School Pub, 2008.