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