Harris, Stephen R
Longman, 1996
Buku Teks
Emmitt, stephen, author
Wiley-Blackwell, 2012
Buku Teks
King, Stephen, author
Qanita, 2005
Buku Teks
Lansing, J. Stephen
Harcourt Brace College , 1995
Buku Teks
King, Stephen, author
A signet book , 1991
Buku Teks