Curran, Daniel J., author
Allyn & Bacon, 1987
Buku Teks
edted by Joseph S. Roucek
Greenwood Press , 1978
Buku Teks
Nevins, Allan, 1890-1971, author
Macmillan, 1927
Buku Teks
Fish, Carld Russel, 1876-1932
Greenwood Press, 1983
Buku Teks
Nevins, Allan, 1890-1971, author
Macmillan, 1957
Buku Teks