New York University Press, 1951
Buku Teks
edited by V.A.C. Gatrell, Bruce Lenman, and Geoffrey Parker
Europa Publications, 1980
Buku Referensi
Jong, Jelle Jan de, 1921-
M. Nijhoff, 1951
Buku Teks
Thomson, David
Longmans, 1962, 1973
Buku Teks
Thody, Philip
Routledge, 2000
Buku Teks