Dyfyniad APA

JAMES TREFIL. (2001). The sciences: An integrated approach. New York: John Wiley and Sons.

Dyfyniad Arddull Chicago

JAMES TREFIL. The Sciences: An Integrated Approach. New York: John Wiley and Sons, 2001.

Dyfyniad MLA

JAMES TREFIL. The Sciences: An Integrated Approach. New York: John Wiley and Sons, 2001.

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