Ward, Russel
Prentice-Hall, 1965
Buku Teks
Ward, Russel
Heinemann educational Australia, 1977
Buku Teks
Ward, Russel
Macmillan, 1987
Buku Teks
Russell, Bertrand, 1872-1970
Unwin Paperbacks, 1977
Buku Teks
Russel, H.D.M.J.
W.E.J. Tjeenk Willink, 1926
Buku Teks