compiled by Robert Lee Wolff
Garland Publishing, 1984
Buku Referensi
Cairns, John C.
Free Press, 1965
Buku Teks
edited by Stanley J. Kunitz, Howard Haycraft
Wilson, 1936
Buku Referensi
Hearder, H.
Buku Teks
Gooch, G.P., author
Beacon Press, 1968
Buku Teks