Johnson, George B., author
McGraw-HIll, 2003
Buku Teks
Eilenberg, Samuel, author
Academic Press, 1974
Buku Teks
Pattie, David, author
Routledge , 2000
Buku Teks
Shye, Samuel
Sage Publications, 1994
Buku Teks
Cambridge University Press, 2003
Buku Teks