APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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