APA (7th ed.) Citation

Coxford, A. F., & Hirsch, C. R. (1991). Geometry from multiple perspectives. National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Coxford, Arthur F., and Christian R. Hirsch. Geometry from Multiple Perspectives. Reston, VA: National Council of Teachers of Mathematics, 1991.

MLA (9th ed.) Citation

Coxford, Arthur F., and Christian R. Hirsch. Geometry from Multiple Perspectives. National Council of Teachers of Mathematics, 1991.