Cita APA (7a ed.)

Haag, V. H., & Dudley, E. A. (1965). Introduction to secondary mathematics. D.C. Heath.

Cita Chicago Style (17a ed.)

Haag, Vincent H., y Edwin A. Dudley. Introduction to Secondary Mathematics. Boston: D.C. Heath, 1965.

Cita MLA (9a ed.)

Haag, Vincent H., y Edwin A. Dudley. Introduction to Secondary Mathematics. D.C. Heath, 1965.