Cita APA (7th ed.)

Leitzel, J. R. C. (1991). A call for change: Recommendations for the mathematical preparation of teachers of mathematics. The Mathematical Association of America.

Cita Chicago (17th ed.)

Leitzel, James R. C. A Call for Change: Recommendations for the Mathematical Preparation of Teachers of Mathematics. Washington, D.C: The Mathematical Association of America, 1991.

Cita MLA (9th ed.)

Leitzel, James R. C. A Call for Change: Recommendations for the Mathematical Preparation of Teachers of Mathematics. The Mathematical Association of America, 1991.