Kennedy, X. J., author
Pearson Longman, 2005
Buku Referensi
Kennedy, X. J., author
Harper Collins College, 1991
Buku Teks
Kennedy, X. J., author
Pearson, 2016
Buku Teks
Hall, Donald
Holt, Rinehart and Winston, 1981
Buku Teks
Kennedy, X. J., author
Harper Collins, 1991
Buku Referensi