USMAN, B. (2017). Issues and challenges of national security. Klamidas Communications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUSMAN, Bukar. Issues and Challenges of National Security. Klamidas Communications, 2017.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUSMAN, Bukar. Issues and Challenges of National Security. Klamidas Communications, 2017.
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