Turner, J.N.
Little, Brown & Co., 1967
Buku Teks
Dixon, Bernard
W.H. Freeman 1994, 1994
Buku Teks
Wilson, Marion E., author
New York , 1979
Buku Teks
Burdon, Kenneth L.
Micmillan , 1971
Buku Teks
Willey, Joanne M., author
Mc Graw Hill, 2008
Buku Teks