Não informado. (1977). Core: Collected original resources in education. Carfax Publishing.
Chicagoスタイル(17版)引用形式Não informado. Core: Collected Original Resources in Education. Oxford, Inglaterra: Carfax Publishing, 1977.
MLA(8版)引用形式Não informado. Core: Collected Original Resources in Education. Carfax Publishing, 1977.
警告: この引用は必ずしも正確ではありません.