Dyfyniad APA
Hartog, J. D. (1977). Strength of materials. Dover Publications.
Dyfyniad Arddull Chicago
Hartog, J.P. Den. Strength of Materials. New York: Dover Publications, 1977.
Dyfyniad MLA
Hartog, J.P. Den. Strength of Materials. Dover Publications, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.