Dyfyniad APA

Grafstein, P., & Schwarz, O. B. (1971). Pictorial handbook of technical devices. Chemical publishing.

Dyfyniad Arddull Chicago

Grafstein, Paul, and Otto B. Schwarz. Pictorial Handbook of Technical Devices. New York: Chemical publishing, 1971.

Dyfyniad MLA

Grafstein, Paul, and Otto B. Schwarz. Pictorial Handbook of Technical Devices. Chemical publishing, 1971.

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