Churchill Livingstone, 2003
Buku Teks
Lester, James D. Sr., 1935-2006
Pearson, 2015
Buku Teks
Lester, James D. Sr., 1935-2006
Pearson, 2015
Buku Teks
Brause, Rita S.
RoutledgeFalmer , 2000
Buku Teks
Thomas, Robert Murray, 1921-
Corwin Press, 2008
Buku Teks