edited by David Nelson
Penguin Books, 2003
Buku Referensi
Mautner, Thomas, author
Penguin Book, 2005
Buku Referensi
Fergusson, Rosalind, author
Bloomsbury Books, 1985
Buku Referensi
Selected with and introduction and notes by Kenneth Allott
Penguin Books, 1950
Buku Teks
edited by Harry Heseltine
Penguin Books, 1979
Buku Teks