Edited by Cinnamon P. Carlarne, Kevin R. Gray, Richard G. Tarasofsky
Oxford University Press, 2016
Buku Teks
Mlynar, Zdenek, author
Westview Press, 1990
Buku Teks
Isaak, Robert A.
Prentice-Hall, 1991
Buku Teks
edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks
Fenwick, Charles G., author
Appleton-Century-Crofts, 1948
Buku Teks