Little, Brown and Co., 1959
Buku Teks
Nightingale, Kath, author
Prentice-Hall, 2002
Buku Teks
edited by Emile Woolf
Pitman, 1986
Buku Teks
Tomasson, Richard F., author
Random Home, 1970
Buku Teks
Andersson, Ingvar
The Swedish Institue, [t.th.]
Buku Teks