Veltrusky, Jiri, author
Peter de Ridder Press, 1977
Buku Teks
Kennedy, X. J., author
Harper Collins, 1991
Buku Referensi
Chang, H.C., author
Edinburgh University Press, 1973
Buku Teks
Wessels, Charlyn, author
Oxford University Press, 1991
Buku Teks
edited by Sylvan Barnet, Morton Berman, William Burto
Harper Collin College, 1992
Buku Teks