Albrecht-Carrie, Rene
Littlefield, Adam & Co., 1959
Buku Teks SO
compiled by Jonathan French Scott and Alexander Baltzly
F.S. Crofts & Co., 1930
Buku Teks SO
Taylor, Alan John Percivale, 1906-1990
Penguin Books in association with Hamish Hamilton, 1967
Buku Teks SO
Schapiro, J. Salwyn
Houghton Miffiln, 1953
Buku Teks SO
Thomson, David
Longmans, 1962, 1973
Buku Teks SO