توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Begle, E. G. (1979). Critical variables in mathematics education: Findings from a survey of the empirical literature. Mathematical Association of America : National Council of Teachers of Mathematics.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Begle, Edward Griffith. Critical Variables in Mathematics Education: Findings from a Survey of the Empirical Literature. Washington, D.C: Mathematical Association of America : National Council of Teachers of Mathematics, 1979.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Begle, Edward Griffith. Critical Variables in Mathematics Education: Findings from a Survey of the Empirical Literature. Mathematical Association of America : National Council of Teachers of Mathematics, 1979.