Chattopadhyay, B. (2004). `A jingle of bells': A short history of general post office, Kolkata. K.P. Bagchi & Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChattopadhyay, Basudeb. `A Jingle of Bells': A Short History of General Post Office, Kolkata. K.P. Bagchi & Company, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रChattopadhyay, Basudeb. `A Jingle of Bells': A Short History of General Post Office, Kolkata. K.P. Bagchi & Company, 2004.
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