Molineu, Harold, author
Westview Press, 1990
Buku Teks
edited by Barry M. Rubin and Elizabeth P. Spiro ; with a foreword by Muriel S. Humphrey
Westview Press, 1979
Buku Teks
edited by Alexander T.J. Lennon
MIT Press, 2002
Buku Teks
Westview Press, 1988
Buku Teks
Spanier, John
Frederck A. Praeger, 1968
Buku Teks