Robbins, S. P. (2008). Training in interpersonal skills (4th ed.). Prentice hall of India.
Chicago ZitierstilRobbins, Stephen P. Training in Interpersonal Skills. 4th ed. New Delhi: Prentice hall of India, 2008.
MLA ZitierstilRobbins, Stephen P. Training in Interpersonal Skills. 4th ed. Prentice hall of India, 2008.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.