Hayward, Stan
Focal Press, 1984
Buku Teks
Sanders, Donald H., author
McGraw-Hill, 1979
Buku Teks
O`Brien, James A., 1936-, author
Richard D. Irwin, 1975
Buku Teks
Bieg, Bernard J., author
Western Publishing , 1986
Buku Teks
Nicholson, T.A.J., author
Pitman, 1974
Buku Teks