Ugural, A. C. (1991). Mechanics of materials. McGraw-Hill.
Dyfyniad Arddull ChicagoUgural, A. C. Mechanics of Materials. New York: McGraw-Hill, 1991.
Dyfyniad MLAUgural, A. C. Mechanics of Materials. McGraw-Hill, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.