APA (7th ed.) Citation

National Council of Teachers of Mathematics, Aichele, D. B., & Coxford, A. F. (1994). Professional development for teachers of mathematics. NCTM.

Chicago Style (17th ed.) Citation

National Council of Teachers of Mathematics, Douglas B. Aichele, and Arthur F. Coxford. Professional Development for Teachers of Mathematics. Reston, VA: NCTM, 1994.

MLA (9th ed.) Citation

National Council of Teachers of Mathematics, et al. Professional Development for Teachers of Mathematics. NCTM, 1994.