Trotter, David, author
Routledge, 1993
Buku Teks
Allen, Walter
E.P. Dutton, 1954
Buku Teks
Allen, Walter
Penguin Books, 1954
Buku Teks
Kettle, Arnold
Hutchinson University Library , 1972
Buku Teks
Otis, William Bradley, author
Barnes & Noble, 1939
Koleksi Publik