Jennings, E. E. 1. (1953). Participation techniques in training. s.n.
Chicagoスタイル(17版)引用形式Jennings, Eugene Emerson 1926. Participation Techniques in Training. s.l: s.n, 1953.
MLA(9版)引用形式Jennings, Eugene Emerson 1926. Participation Techniques in Training. s.n, 1953.
警告: この引用は必ずしも正確ではありません.