Ferrer, Jami
Mosaic II: a listening/speaking skills book
Random House, 1985
 Buku Teks SO
Ramelan P. Utojo
Reading practice : for reading speed improvement / Ramelan
IKIP Semarang Press , 1990
 Buku Teks SO
Dixson, Robert J.
Modern American English; Book 1
Regents Publishing, 1971
 Buku Teks SO
Murray, Maggie
Streets ahead: student's book 2
Oxford University Press, 1994
 Buku Teks SO
O`Neill, Robert
Kernel lessons intermediate students book / Robert O'Neill, Roy Kingsbury, and Tony Yeadon
Longman, 1990
 Buku Teks SO