Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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