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