Thompson, Willard M.
McGraw-Hill , 1968
Buku Teks
Fernandez, Judi N., 1941-, author
John Wiley & Sons, 1980
Buku Teks
Tagliaferri, Louise E.
John Wiley & Sons, 1979
Buku Teks
Ivey, Paul W.
Prentice-Hall, 1961
Buku Teks
Jenks, Ernest E., author
Alexander hamilton Institute, 1962
Buku Teks