Bird, D. (2008). Commonsense Direct and Digital Marketing (5th.). Kogan Page India Private Limited.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBird, Drayton. Commonsense Direct and Digital Marketing. 5th. New Delhi: Kogan Page India Private Limited, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBird, Drayton. Commonsense Direct and Digital Marketing. 5th. Kogan Page India Private Limited, 2008.
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