Carhuff, R. R. (1980). The art of helping IV. Human Resource Development Press.
Chicagoスタイル(17版)引用形式Carhuff, Robert R. The Art of Helping IV. Amherst, MA: Human Resource Development Press, 1980.
MLA(9版)引用形式Carhuff, Robert R. The Art of Helping IV. Human Resource Development Press, 1980.
警告: この引用は必ずしも正確ではありません.