Stokes, William Lee, 1915-
Prentice-Hall, 1966
Buku Teks
Stokes, William Lee, 1915-
Prentice-Hall, 1962
Buku Teks
Woodford, A.O.
W.H. Freeman, 1965
Buku Teks SO
Tarbuck, Edward J.
Maxwell Macmillan, 1993
Buku Teks
Holmes, D.C.
Macmillan, 1960
Buku Teks