CP Books, [date of publication not identified]
Buku Teks
University of California Press, 1947
Buku Teks
Spate, Oskar Hermann Kristian
Oxford University Press, 1965
Buku Teks
Twain, Mark, 1835-1910
Penguin Books, 1973
Buku Teks
Thakur, Ramesh, editor
London: Westview Press, 1986,
Buku Referensi