Mulgan, John
Clarendon Press, 1967
Buku Teks SO
by Herbert Barrows [and others]; under the general editorship of Gordon N. Ray
Houghton Miffiln, 1959
Buku Teks SO
edited by Louis G. Locke, William M. Gibson, George W. Arms
Holt, Rinehart and Winston, 1959
Buku Teks SO
Holt, Rinehart and Winston, 1957
Koleksi Publik
Blamires, Harry
Routledge, 1994
Buku Teks SO