editor Sir Lawrence Collins
Sweet & Maxwell, 2008
Buku Teks
Larson, Laurence M., author
Holt , 1926
Buku Teks
Morton, A.L., author
Victor Gollancz, 1938
Buku Teks
Richards, Denis, author
Longman, Green, 1952
Buku Teks
Wilkes, Peter, author
Peter Wilkes, 1978
Buku Teks