Wade, E. C. S. (Emlyn Capel Stewart), author
Longmans Green, 1951
Buku Teks
Schmitt, Carl, author
Duke University Press, 2008
Buku Teks
Wade, E. C. S. (Emlyn Capel Stewart), author
[publisher not identified], [date of publication not identified]
Buku Teks
Nowak, John E., author
Thomson/West, 2010
Buku Teks
Brazier, Rodney, author
Oxford University Press, 1988
Buku Teks