edited by. Dewa, Michael
K.G. Saur, 1989
Buku Referensi
Edwards, Heather M., 1947-
Scarecrow Press, 1990
Buku Teks
edited by J. Stephen Parker
Mansell, 1983
Buku Teks
edited by Kent Hendrickson
The Haworth Press , 1991
Buku Teks
Mckay, Duncan
Aslib , 1995
Buku Teks