Nilson, A. H., & Darwin, D. (1997). Design of concrete structures (12th ed.). New York: McGraw-Hill.
Dyfyniad Arddull ChicagoNilson, Arthur H., và David Darwin. Design of Concrete Structures. 12th ed. New York: McGraw-Hill, 1997.
Dyfyniad MLANilson, Arthur H., và David Darwin. Design of Concrete Structures. 12th ed. New York: McGraw-Hill, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.