Checkland, Peter, author
John Wiley & Sons, 2009
Buku Teks
Forster, E.M. (Edward Morgan), 1879-1970, author
Noura Books, 2015
Buku Teks
Forster, Edward Morgan, 1879-1970, author
Vintage Books, 1961
Buku Teks
Artikel Jurnal
Brown, John Mason
The Viking Press, 1963
Buku Teks