Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

National Council of Teachers of Mathematics, Douglas B. Aichele, i Arthur F. Coxford. Professional Development for Teachers of Mathematics. Reston, Va: National Council of Teachers of Mathematics, 1994.

Cita MLA (9th ed.)

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