Ottaway, J. H.
English Language Book Society and Bailliere Tindall, 1984
Buku Teks SO
Campbell, Mary K.
Brooks/Cole Cengage Learning, 2008
Buku Teks SO
Mathews, Christopher K.
Addison-Wesley, 2000
Buku Teks
Glick, David
Appleton & lange , 1995
Buku Teks SO
Rastogi, S.C.
Tata McGraw-Hill, 1995
Buku Teks SO