@article{Yankelovich, author = {Yankelovich, D.}, title = {Wer hat noch Lust zu arbeiten}, series = {Psychologie heute, Vol. 5 (No. 11, 1978), pp. 14-21.}, journal = {Psychologie heute, Vol. 5 (No. 11, 1978), pp. 14-21.}, language = {de} } @book{YankelovichBarrett, author = {Yankelovich, D. and Barrett, W.}, title = {Ego and instinct, New York (Random House) 1970.}, language = {en} }