Felbeck, D. K. (1968). Introduction to strengthening mechanisms. Prentice-Hall.
Dyfyniad Arddull ChicagoFelbeck, David K. Introduction to Strengthening Mechanisms. Englewood Cliffs, N.J.: Prentice-Hall, 1968.
Dyfyniad MLAFelbeck, David K. Introduction to Strengthening Mechanisms. Prentice-Hall, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.