National Society for the Study of Education. Committee on Mathematics Education & Begle, E. G. (1970). Mathematics education. NSSE.
Lua i Stíl Chicago (17ú heag.)National Society for the Study of Education. Committee on Mathematics Education agus Edward Griffith Begle. Mathematics Education. Chicago: NSSE, 1970.
Lua MLA (9ú heag.)National Society for the Study of Education. Committee on Mathematics Education agus Edward Griffith Begle. Mathematics Education. NSSE, 1970.
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