Essick, Edward L., author
Science Research Associates, 1984
Buku Teks
O`Brien, James A., 1936-, author
Richard D. Iriwin, 1986
Buku Referensi
Maisel, Herbert, author
McGraw-Hill, 1969
Buku Teks
Mandell, Steven L., author
West Publishing, 1983
Buku Teks
Mader, Chris, author
Science Research Associates , 1974
Buku Teks