USMAN, B. (2017). Issues and challenges of national security. Klamidas Communications.
Čikaški stil citiranja (17. izdanje)USMAN, Bukar. Issues and Challenges of National Security. Klamidas Communications, 2017.
MLA način citiranja (9. izdanje)USMAN, Bukar. Issues and Challenges of National Security. Klamidas Communications, 2017.
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