Goodrich, L. Carrington (Luther Carrington), 1894-, author
Waverly Press, 1935
Buku Teks
Grantham, A.E.
Methuen & Co, 1927
Buku Teks
Reston, James, author
Doubleday, 2005
Buku Teks
Blais, Marie-Claire, 1939-, author
McClelland and Stewart, 1979
Buku Teks
Elkins, William R., author
McGraw-Hill, 1982
Buku Teks