Holt, Rinehart and Winston, 1957
Koleksi Publik
by Herbert Barrows [and others]; under the general editorship of Gordon N. Ray
Houghton Miffiln, 1959
Buku Teks SO
New, Christopher
Routledge, 1999
Buku Teks SO
Corstius, Jan Brandt
Random House, 1968
Buku Teks SO
W.W. Norton & Company, 1973
Buku Teks SO