Willener, Alfred
Pantheon Books, 1970
Buku Teks
Lamm, Martin
Norwood Editions,, 1977
Buku Teks
Greenfield, Patricia Marks
Academic Press, 1976
Buku Teks
Cosbuc, George, author
Minerva, 1980
Buku Teks
Yeats, W.B., author
Everyman's Library, 1992
Buku Referensi