Dyfyniad APA
Beer, F. P., Johnston, E. R., & DeWolf, J. T. (2001). Mechanics of materials (3rd ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Beer, Ferdinand P., E Russell Johnston, and John T. DeWolf. Mechanics of Materials. 3rd ed. New Delhi: McGraw-Hill, 2001.
Dyfyniad MLA
Beer, Ferdinand P., et al. Mechanics of Materials. 3rd ed. McGraw-Hill, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.