edited by Joseph S. Wholey
Jossey-Bass Publishers, 1994
Buku Teks
edited by Joseph S. Wholey, Harry P. Hatry and Kathryn E. Newcomer
Jossey-Bass, 1994
Buku Referensi
Anderson, Scarvia B.
Jossey-Bass, 1978
Buku Teks
edited by Jeffrey J. Magnavita
John Wiley & Sons, 2003
Buku Teks SO
Morton Deutsch, Peter T. Coleman
Jossey-Bass Publishers, 2000
Buku Teks