Worrell, Ernst, editor
Elsevier, 2014
eBooks
Gibaldi, Joseph
The Modern Language Association of America, 1998
Buku Teks
Turock, Betty J., author
Neal-Schuman Publishers, 1992
Buku Teks
Nelson, Bonnie R.
Scarecrow Press, 1982
Buku Referensi
Gower, 1990
Buku Referensi