compiled by Carlos Castillo & Otto F. Bond
The University of Chicago Press, 1948
Buku Referensi
Lang, Robert E., author
Brookings Institution Press, 2003
Buku Teks
edited by Thomas R. Dye, Brett W. Hawkins
Charles E. Merrill, 1967
Buku Teks
Norris, Frank
New York: Grove Press, 1956
Buku Teks
Norris, Frank
Grove Press, 1956
Buku Teks