Flower, William Henry, author
Routledge/Thoemmes Press, 1996
Buku Referensi
Acland, Henry W., author
Routledge/Thoemmes Press, 1996
Buku Referensi
Edwards, Edward, author
Routledge/Thoemmes Press, 1996
Buku Referensi
Lunden, Staffan, author
Goteborg Universitet, 2016
Buku Teks
Woo, Kyu Sung, author
Rockport Publishers, 1999
Buku Teks