Black, Michael
Objective IELTS advanced student's book
Cambridge University Press, 2008
 Buku Teks SO
Boyd, Elaine
Objective IELTS.
Cambridge University Press, 2006
 Multimedia
Boyd, Elaine
Objective IELTS.
Cambridge University Press, 2006
 Multimedia
Zemansky, Mark Waldo, 1900-
Heat and thermodynamics : an intermediate textbook for student
McGraw-Hill, 1957
 Buku Teks SO
Carman, Robert A.
Student solutions manual for intermediate algebra: a guided approach
John Wiley & Sons, 1980
 Buku Teks SO