APA (7th ed.) Citation

Begle, E. G., & Steen, L. A. (1979). Critical variables in mathematics education: Findings from a survey of the empirical literature. Math. Assoc. of America.

Chicago Style (17th ed.) Citation

Begle, Edward G., and Lynn Arthur Steen. Critical Variables in Mathematics Education: Findings from a Survey of the Empirical Literature. Washington, DC: Math. Assoc. of America, 1979.

MLA (9th ed.) Citation

Begle, Edward G., and Lynn Arthur Steen. Critical Variables in Mathematics Education: Findings from a Survey of the Empirical Literature. Math. Assoc. of America, 1979.