Black, C.E.
Alfred A. Knopf, 1966
Buku Teks
Stromberg, Roland N.
Prentice-Hall, 1997
Buku Teks
BUrgess, 1975
Buku Teks
Taylor, Alan John Percivale, 1906-1990
Penguin Books in association with Hamish Hamilton, 1967
Buku Teks
compiled by Jonathan French Scott and Alexander Baltzly
F.S. Crofts & Co., 1930
Buku Teks