Narayanan, P. K. (1977). Effectiveness of slides in communicating farm information to rural audience [microform]. Photoduplication Service. University of the Philippines Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNarayanan, P. K. Effectiveness of Slides in Communicating Farm Information to Rural Audience [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNarayanan, P. K. Effectiveness of Slides in Communicating Farm Information to Rural Audience [microform]. Photoduplication Service. University of the Philippines Library, 1977.
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