Rossi, Peter H.
Sage Publications, 1980
Buku Teks
Gelles, Richard J., author
Sage, 1997
Buku Teks
Geeorge Allen , 1971
Buku Teks
Nelson, Gary M., author
Barret-Koehler Publishers, Inc., 2000
Buku Teks
Wilson, Susane Jannah, author
McGraw-Hill, 1991
Buku Teks