Pulvers, Roger, author
Angus & Robertson, 1981
Buku Teks
Wills, Adele, author
Routledge, 2004
Buku Teks
Lee, Mun-yol, author
Si-sa-yong-o-sa, 1986
Buku Teks
Goodman, David G., author
Lexington Book, 2000
Buku Teks
Varley, H. Paul
Praegar Publisher , 1973
Buku Teks