Ignizio, James P.
Sage, 1985
Buku Teks SO
Feiring, Bruce R.
Sage University Paper, 1986
Buku Teks SO
An-Min, Chung
Charles E. Merill Publishing CO., [;1963;1963, 1963]
Buku Teks SO
Hadley, George, 1930-
Addison-Wesley, 1962
Buku Teks SO
An-Min, Chung
Charles E. Merill Publishing CO., 1963
Buku Teks SO