Smith, Kevin, author
Westview Press, Boston, Massachusetts : Credo Reference, 2013
Buku Teks
Fischer, Frank, author
Oxford University Press, 2012
Buku Teks
by Peter Knoepfel ... [and others]
Policy Press, 2007
Buku Teks
Dunn, William N.
Hanindita, 1988
Buku Teks
edited by Wil A.H. Thissen and Warren E. Walker
Springer, 2013
Buku Teks