Shepherd, James F.
RSVP the Houghton Mifflin reading, study, and vocabulary program
Houghton Miffiln, 1984
 Buku Teks SO
Cunningham, Sarah
Everyday listening and speaking : intermediate
Oxford University Press, 1994
 Buku Teks SO
Yates, Paulene M.
Workbook and handbook : the new building better english / Paulene M. Yates, Edward N. de Laney
Harper & Row, 1962
 Buku Teks SO
Hornsby, Beve
Alpha to omega : the A-Z of teaching, reading, writing and spelling / Beve Hornsby and Frula Shear
Heinemann , 1993
 Buku Teks SO
Cunningham, Sarah
Everyday listening and speaking pre-intermediate
Oxford University Press , 1994
 Buku Teks SO