Huszar, George B. de (George Bernard), 1919-1968, author
Barnes & Noble, 1951
Buku Teks
Griffith, Martin, author
Routledge, 2002
Buku Teks
edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks
Goodpaster, Gary, author
University of California, 1993
Buku Teks
Spero, Joan Edelman, author
Wadsworth, 2010
Buku Teks