Dyfyniad APA

NOWLAN, R. A., & WASHBURN, R. M. (1975). Geometry for teachers. Harper and row.

Dyfyniad Arddull Chicago

NOWLAN, Robert A., and Robert M. WASHBURN. Geometry for Teachers. New York: Harper and row, 1975.

Dyfyniad MLA

NOWLAN, Robert A., and Robert M. WASHBURN. Geometry for Teachers. Harper and row, 1975.

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