Levy, Michael, 1950-
Cambridge University Press, 2016
Buku Teks SO
Norton, Donna E.
Merril; A Bell and Howell Information, 1987
Koleksi Publik
Norton, Donna E.
Merril; A Bell and Howell Information, 1987
Buku Teks
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