Risjord, Norman K.
Prentice-Hall, 1985
Buku Teks
Beard, Charles A.
New Home Library, 1944
Buku Teks
Alden, John Richard
American Book Company, 1960
Buku Teks SO
Myers, Margaret G.
Columbia University Press , 1970
Buku Teks
by John M. Blum ... [et al.]
Harcourt, Brace & World, 1963
Buku Teks