Dyfyniad APA

BEER, F. P., & JOHNSTON, E. R. (1992). Mechanics of materials.-- Ed.2. McGraw-Hill Book.

Dyfyniad Arddull Chicago

BEER, Ferdinand P., and E. Russell JOHNSTON. Mechanics of Materials.-- Ed.2. London: McGraw-Hill Book, 1992.

Dyfyniad MLA

BEER, Ferdinand P., and E. Russell JOHNSTON. Mechanics of Materials.-- Ed.2. McGraw-Hill Book, 1992.

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