Long, Larry E.
Reston Publishing, 1979
Buku Teks
Lord, Kenniston W.
Van Nostrand Reinhold, 1978
Buku Teks
Spencer, Donald D.
Charles E. Merrill, 1982
Buku Teks
Carroll, Harry
John Wiley & Sons, 1974
Buku Teks
Awad, Elias M.
Prentice-Hall, 1966
Buku Teks