Manning, Peter J., author
Oxford University Press, 1990
Buku Teks
Darbishire, Helen, 1881-1961, author
Longmans, 1953
Buku Teks
Siegel, Paul N., author
University of Notre Dame Press, 1968
Buku Teks
Clemen, Wolfgang, author
Methuen, 1977
Buku Teks
edited by A.M. Eastman and G.B. Harrison
University of Michigan Press, 1964
Buku Teks