Dyfyniad APA
Beer, F. P., & Johnston, E. R. (2006). Mechanics of materials (5th ed.). McGraw Hill.
Dyfyniad Arddull Chicago
Beer, Ferdinand P., and E. Russel Johnston. Mechanics of Materials. 5th ed. New Delhi: McGraw Hill, 2006.
Dyfyniad MLA
Beer, Ferdinand P., and E. Russel Johnston. Mechanics of Materials. 5th ed. McGraw Hill, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.