Kotchko, V. (1992). UNESCO and the international response to the gaps. Sharif Journal of Mechanical Engineering, 8(3), 20–26.
Kotchko, V. "UNESCO and the international response to the gaps.", Sharif Journal of Mechanical Engineering, 8, 3, 1992, 20–26.
Kotchko, V. (1992). 'UNESCO and the international response to the gaps.', Sharif Journal of Mechanical Engineering, 8(3), pp. 20–26.
Kotchko, V., "UNESCO and the international response to the gaps.." Sharif Journal of Mechanical Engineering, 8 3 (1992): 20–26,
Kotchko V. UNESCO and the international response to the gaps. Sharif Journal of Mechanical Engineering. 1992;8(3):20–26 (In Persian).
