Baldwin, James, 1924-1987, author
Dell Publishing, 1963
Buku Teks
Tyler, Forrest B.
Plenum Press, 1991
Buku Teks
Charles A Gallagher, editor
McGraw-Hill, 2012
Buku Teks
Ancheta, Angelo N.
Rutgers University Press, 1998
Buku Teks
Pettigrew, Thomas F., author
McGraw-Hill, 1971
Buku Teks