APA
Waked K. I., . (1992). Design of reinforced concrete stairs. Giza: Scientific book house.
Chicago
Waked Khalil Ibrahim, . 1992. Design of reinforced concrete stairs. Giza: Scientific book house.
Harvard
Waked K. I., . (1992). Design of reinforced concrete stairs. Giza: Scientific book house.
MLA
Waked Khalil Ibrahim, . Design of reinforced concrete stairs. Giza: Scientific book house. 1992.