Little, Brown and Co., 1959
Buku Teks
P.A Norstedt & Soner Forlag, 1981
Buku Teks
Danelius, Hans
The Swedish Institute, 1981
Buku Teks
Child, Marquis W.
Yale University Press , 1936
Buku Teks
Verney, Douglas V., author
Liverpool University Press, 1959
Buku Teks