Azar, Betty Schrampfer, 1941-
Fundamentals of English grammar / Betty Schrampfer Azar ; Barbara Matthies
Prentice-Hall, 1985
 Buku Teks
Azar, Betty Schrampfer, 1941-
Understanding and using english grammer
Pearson Education, 2009
 Buku Teks
Azar, Betty Schrampfer, 1941-
Understanding and using English grammar
Prentice Hall Regents, 1989
 Buku Referensi
Azar, Betty Schrampfer, 1941-
Understanding and using english grammar
Binarupa Aksara, 1993
 Buku Teks
McCarthy, Michael
English vocabulary in use : upper-intermediate & advanced
Erlangga, 2002
 Buku Teks