Beard, Charles A.
New Home Library, 1944
Buku Teks SO
Alden, John Richard
American Book Company, 1960
Buku Teks SO
Williams, T. Harry
Alfred A. Knopf, 1963
Buku Teks SO
Myers, Margaret G.
Columbia University Press , 1970
Buku Teks
by John M. Blum ... [et al.]
Harcourt, Brace & World, 1963
Buku Teks SO