Mason, Alpheus Thomas,1899-1989, author
Prentice-Hall, 1993
Buku Teks
Strong, Frank R., author
Dennis & Co., 1950
Buku Teks
Fisher, Louis, author
McGraw-Hill, 1988
Buku Teks
Wright, Benjamin F., author
Phoenik Books, 1967
Buku Teks
Dowling, Noel T., author
Foundation Press, 1954
Buku Teks