Dyfyniad APA

Ramsey, W. L. (1986). Physical science. Holt, Rinehart and Winston.

Dyfyniad Arddull Chicago

Ramsey, William L. Physical Science. New York: Holt, Rinehart and Winston, 1986.

Dyfyniad MLA

Ramsey, William L. Physical Science. Holt, Rinehart and Winston, 1986.

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