Penguin Books, 1979
Koleksi Publik
edited by Harry Heseltine
Penguin Books, 1979
Buku Teks
Penguin, 1958
Koleksi Publik
Selected with and introduction and notes by Kenneth Allott
Penguin Books, 1950
Buku Teks
edited with an introduction by Harry Heseltine
Penguin Books, 1981
Buku Teks