Παραπομπή APA

Zyl Van D. J. A & Vick, G. S. (1988). Hydraulic Fill Structures. American society of Civil Engineers.

Παραπομπή Chicago Style

Zyl Van D. J. A και G. Steven Vick. Hydraulic Fill Structures. New York: American society of Civil Engineers, 1988.

Παραπομπή MLA

Zyl Van D. J. A και G. Steven Vick. Hydraulic Fill Structures. American society of Civil Engineers, 1988.