Elyasi, H. (1993). Different levels of development and its role in technology. Sharif Journal of Civil Engineering, Vol. 9(4), 19–21.

Elyasi, H. "Different levels of development and its role in technology", Sharif Journal of Civil Engineering, Vol. 9, 4, 1993, 19–21.

Elyasi, H. (1993). 'Different levels of development and its role in technology', Sharif Journal of Civil Engineering, Vol. 9(4), pp. 19–21.

Elyasi, H., "Different levels of development and its role in technology." Sharif Journal of Civil Engineering, Vol. 9 4 (1993): 19–21,

Elyasi H. Different levels of development and its role in technology. Sharif Journal of Civil Engineering. 1993;Vol. 9(4):19–21 (In Persian).