Wright, Lyle H.
Hunting Library, 1969
Buku Referensi
selected and with an introduction by Nancy Sullivan
Banrnes and Noble Books, 1981
Buku Teks
Platt, Charles
Xanadu, 1987
Buku Teks
Sage, Lorna, author
Macmillan, 1992
Buku Teks
Perosa, Sergio
New York University Press, 1985
Buku Teks