Macmillan, 1990
Buku Teks
Galvin, Kathleen M.
Scott, Foresman and Company , 1982
Buku Teks
Ballinger Publishing Company, 1986
Buku Teks
Dyere, Everett D., author
McGraw-Hill, 1979
Buku Teks
Kidman, Antony
Biochemical & General Services, 1995
Buku Teks