Simon, Henry W.
Collier Books, 1966
Buku Teks
Buckley, Francis J.
Sage, 1999
Buku Teks
Phares Odaffer, Randall Charles, Thomas Cooney, John Dossey, Jane Schielack
Pearson Addison Wesley, 2008
Buku Teks SO
Long, Calvin T.
Pearson - Addison Wesley, 2009
Buku Teks SO
Garstens, Helen L.
Macmillan, 1969
Buku Teks SO