APA (7 वां संस्करण) प्रशस्ति पत्र
Singh, N. (2007). Problems and solutions in project management and control (Rev. ed.). Himalaya Pub. House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Singh, Narendra. Problems and Solutions in Project Management and Control. Rev. ed. Mumbai [India]: Himalaya Pub. House, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Singh, Narendra. Problems and Solutions in Project Management and Control. Rev. ed. Himalaya Pub. House, 2007.
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