[publisher not identified], [date of publication not identified]
Buku Klasik
Blofeld, John
Allen & Unwin, 1977
Buku Teks
Ebstein, Michael, author
Brill, 2014
eBooks
Armstrong, Karen, author
Phoenix, 2000
Buku Teks
Kelen, Betty, author
Graham Brash, 1990
Buku Teks