Dyfyniad APA

Roylance, D., & David Roylance. Mechanics of materials. New York: Wiley.

Dyfyniad Arddull Chicago

Roylance, David, và David Roylance. Mechanics of Materials. New York: Wiley.

Dyfyniad MLA

Roylance, David, và David Roylance. Mechanics of Materials. New York: Wiley.

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