Gordon, Lincoln, author
Harvard University Press, 1963
Buku Teks
edited by David Collier
Princeton University Press, 1979
Buku Teks
Deutschmann, Paul J., author
N.Y. Praeger , 1968
Buku Teks
Molineu, Harold, author
Westerview Press, 1990
Buku Teks
Molineu, Harold, author
Westview Press, 1990
Buku Teks