APA (7th ed.) Citation

Kespohl, R. C. (1979). Geometry problems my students have written. National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Kespohl, Ruth Carwell. Geometry Problems My Students Have Written. Reston, Va.: National Council of Teachers of Mathematics, 1979.

MLA (9th ed.) Citation

Kespohl, Ruth Carwell. Geometry Problems My Students Have Written. National Council of Teachers of Mathematics, 1979.

Warning: These citations may not always be 100% accurate.