India. Committee on Public Undertakings (1981-82). (1981). Report (Seventh Lok Sabha): 27th Report: Hindustan Teleprinters Ltd. Lok Sabha Secretariat.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIndia. Committee on Public Undertakings (1981-82). Report (Seventh Lok Sabha): 27th Report: Hindustan Teleprinters Ltd. Lok Sabha Secretariat, 1981.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIndia. Committee on Public Undertakings (1981-82). Report (Seventh Lok Sabha): 27th Report: Hindustan Teleprinters Ltd. Lok Sabha Secretariat, 1981.
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