Hoppock, R. (1949). Group guidance: Principles, techniques, and evaluation. McGraw-Hill Book Co..
Chicagoスタイル(17版)引用形式Hoppock, Robert. Group Guidance: Principles, Techniques, and Evaluation. New York: McGraw-Hill Book Co., 1949.
MLA(8版)引用形式Hoppock, Robert. Group Guidance: Principles, Techniques, and Evaluation. McGraw-Hill Book Co., 1949.
警告: この引用は必ずしも正確ではありません.