edited by David B. Allison
Sage, 1995
Buku Referensi
Benjamin B. Wolman, editor; George Stricker, co-editor
John Wiley & Sons, 1994
Buku Referensi
Corbetta, Piergiorgio, author
Sage Publications , 2003
Buku Teks
Lodico, Marguerite G., author
Jossey-Bass, 2010
Buku Teks
edited by Kathryn Dean
Sage, 1993
Buku Teks