Elliott, Roger J., author
English Language Book Society, 1978
Buku Teks
Gennaro, Joseph J.
Macmillan, 1965
Buku Teks
Koechner, Walter
Springer, 1996
Buku Teks
Thomason, Michael, author
Reston Publishing, 1979
Buku Referensi
Ferendeci, Altan M., author
McGraw-Hill, 1991
Buku Teks