Bennett, Jeffrey O.
Pearson - Addison Wesley, 2009
Buku Teks
Smith, Gary
Allyn and Bacon, 1985
Buku Teks
Erickson, Roy V.
Allyn and Bacon, 1985
Buku Teks
Li, Jerome C.R.
Edwards Brothers, 1964
Buku Teks
Bryant, Edward C.
McGraw-Hill Book , 1966
Buku Teks