Dyfyniad APA

Crawford, R. (1998). Plastics engineering (3rd ed.). Butterworth Heinemann.

Dyfyniad Arddull Chicago

Crawford, R.J. Plastics Engineering. 3rd ed. Oxford: Butterworth Heinemann, 1998.

Dyfyniad MLA

Crawford, R.J. Plastics Engineering. 3rd ed. Butterworth Heinemann, 1998.

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