Crocker, Walter R. (Walter Russell), 1902-, author
George Allen and Unwin, 1949
Buku Teks
Kolarz, Walter
Frederick A.Praeger, 1955
Buku Teks
Walker, Shirley
Oxford University Press, 1982
Buku Referensi
Walker, David, author
Nelson, 1992
Buku Teks
Walker, Kath
The Jacaranda Press, 1981
Buku Teks