Dyfyniad APA
Riley, W. F., Sturges, L. D., & Morris, D. H. (1999). Mechanics of materials (5th ed.). John Wiley.
Dyfyniad Arddull Chicago
Riley, William F., Leroy D. Sturges, and Don H. Morris. Mechanics of Materials. 5th ed. New York: John Wiley, 1999.
Dyfyniad MLA
Riley, William F., et al. Mechanics of Materials. 5th ed. John Wiley, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.