Garrett, Mitchell B.
Appleton-Century-Crofts, , 1947
Buku Teks
Albrecht-Carrie, Rene
Methuen , 1970
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
Bullock, Alan, author
Harper and Row, 1962
Buku Teks