Dyfyniad APA

Beer, F. P., & Johnston, E. R. (1987). Mechanics for engineers (4th ed.). McGraw-Hill Book Company.

Dyfyniad Arddull Chicago

Beer, Ferdinand P., and E. Russell Johnston. Mechanics for Engineers. 4th ed. New York: McGraw-Hill Book Company, 1987.

Dyfyniad MLA

Beer, Ferdinand P., and E. Russell Johnston. Mechanics for Engineers. 4th ed. McGraw-Hill Book Company, 1987.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.