Cordon, William E.
McGraw-Hill, 1979
Buku Teks
Budinski, Kenneth G., author
Prentice-Hall, 1999
Buku Teks
Keyser, Carl A.
Prentice-Hall, 1956
Buku Teks
Budinski, Kenneth G., author
Pearson Education, 2002
Buku Teks
John, V.B., author
Macmillan, 1983
Buku Teks