O`Hagan, Andrew, 1968-, author
Houghton Mifflin Harcourt, 2013
Buku Teks
Robins, C. Richard, author
Houghton-Miffiln, 1986
Buku Teks
Oxford University Press, 1938
Buku Teks
Joshua, Wynfred, author
Sage, 1973
Buku Teks
edited by Gerald DeWitt Sanders, John Herbert Nelson, M.L. Rosenthal
Macmillan, 1970
Buku Teks