USMAN, B. (2017). Issues and challenges of national security. Klamidas Communications.
芝加哥风格引文USMAN, Bukar. Issues and Challenges of National Security. Klamidas Communications, 2017.
MLA引文USMAN, Bukar. Issues and Challenges of National Security. Klamidas Communications, 2017.
警告：这些引文格式不一定是100％准确.