de Vries, Louis, author
McGraw-Hill, 1951
Buku Referensi
Hewitt, Paul G., author
Pearson - Addison Wesley, 2008
Buku Teks
Merken, Melvin, author
Saunders College Publishing, 1993
Buku Teks
Riban, David M., author
McGraw-Hill, 1982
Buku Teks
Rosen, Sidney, author
Harper & Row , 1965
Buku Teks