Sanders, Donald H., author
McGraw-Hill Book, 1985
Buku Teks
Ferris, Paul
Hutchinson , 1968
Buku Teks
Ball, Victoria Kloss, author
John Wiley & Sons, 1980
Buku Teks
Compton, Charles, author
McGarw-Hill, 1979
Buku Teks
Downs, Anthony
Little, Brown and Co., 1967
Buku Teks