edited by Allan Nevins and Louis M. Hacker
D.C. Heath, 1943
Buku Teks
Buchanan, A. Russell, author
Harper & Row, [c1964]
Buku Teks
Buchanan, A. Russell, author
Harper & Row, Publishing, 1964
Buku Teks
Langer, William L., author
P. Smith, 1968
Buku Teks
Hoover, Herbert, 1874-1964, author
McGraw-Hill, 1958
Buku Teks