APA استشهاد

Felbeck, D. K. (1968). Introduction to strengthening mechanisms. Prentice-Hall.

استشهاد بنمط شيكاغو

Felbeck, David K. Introduction to Strengthening Mechanisms. Englewood Cliffs, N.J.: Prentice-Hall, 1968.

MLA استشهاد

Felbeck, David K. Introduction to Strengthening Mechanisms. Prentice-Hall, 1968.