Belknap, Joanne
Wadsworth, 1996
Buku Teks
Keller, Rudi
Routledge, 1994
Buku Teks
Greenberg, Stanley, 1956-, author
The Johns Hopkins University Press, 1998
Buku Teks
Sandmaier, Marian
Tab Books, 1992
Buku Teks
Walker, Peter, author
MIT Press, 1998
Buku Teks