ebrary, Inc, & Schuman, S. (2010). The handbook for working with difficult groups: How they are difficult, why they are difficult and what you can do about it. Jossey-Bass.
Παραπομπή σε μορφή Chicago (17η εκδ.)ebrary, Inc, και Sandy Schuman. The Handbook for Working with Difficult Groups: How They Are Difficult, Why They Are Difficult and What You Can Do About It. San Francisco: Jossey-Bass, 2010.
Παραπομπή σε μορφή MLA (9th εκδ.)ebrary, Inc, και Sandy Schuman. The Handbook for Working with Difficult Groups: How They Are Difficult, Why They Are Difficult and What You Can Do About It. Jossey-Bass, 2010.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.