Fowler, H. Ramsey
Little, Brown & Co., 1980
Buku Referensi
Meyer, Michael
Little, Brown, 1982
Buku Teks
Sargent, Lyman Tower
Brooks Cole, 1990
Buku Teks
edited by Joel J. Lersier
Englewood Cliffs, N.J., Prentice-Hall
Buku Teks
Selden, Raman
The University Press of Kentucky , 1993
Buku Teks