Dyfyniad APA

Fred Reinfeld. (1961). Science for tomorrow. New York: Sterling.

Dyfyniad Arddull Chicago

Fred Reinfeld. Science for Tomorrow. New York: Sterling, 1961.

Dyfyniad MLA

Fred Reinfeld. Science for Tomorrow. New York: Sterling, 1961.

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