Azar, Betty Schrampfer, 1941-, author
Understanding and using english grammer / Betty Schrampfer Azar
Longman, 2002
 Buku Teks
Azar, Betty Schrampfer, 1941-, author
Fundamentals of English grammar / Betty Schrampfer Azar ; Barbara Matthies
Prentice-Hall, 1985
 Buku Teks
Azar, Betty Schrampfer, 1941-, author
Understanding and using english grammer
Pearson Education, 2009
 Buku Teks
Azar, Betty Schrampfer, 1941-, author
Understanding and using english grammar
Binarupa Aksara, 1993
 Buku Teks
Azar, Betty Schrampfer, 1941-, author
Understanding and using English grammar
Prentice Hall Regents, 1989
 Buku Referensi
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