Ijabi,E. (2005). Introduction to Operational Research (OR). Military Science and Tactics, 1(1), 73-80.

Ijabi,E. . "Introduction to Operational Research (OR)", Military Science and Tactics, 1, 1, 2005, 73-80.

Ijabi E. (2005). 'Introduction to Operational Research (OR)', Military Science and Tactics, 1(1), pp. 73-80.

E. Ijabi, "Introduction to Operational Research (OR)," Military Science and Tactics, 1 1 (2005): 73-80,

Ijabi E. Introduction to Operational Research (OR). Military Science and Tactics, 2005; 1(1): 73-80.