Kenney, John Paul, author
Thomas, [1959]
Buku Teks
Trautman, Neal E., author
Pearson Prentice Hall, 2005
Buku Teks
Lundman, Richard J., author
Holty,Rinchart and Winston, 1980
Buku Teks
Shaw, Clifford R.
University of Chicago, 1969
Buku Teks
Muncie, John
Sage, 1999
Buku Teks