Univ of Pittsburh Press, 1991
Buku Teks
Dahl, Robert A., 1915-2014, author
Prentice Hall of India, 1976
Buku Teks
Dahl, Robert A., 1915-2014, author
Prentice-Hall, 1978
Buku Teks
edited by Michael Banton
Tavistock Publications, 1972
Buku Teks
Itzkoff, Seymour W.
Peter Lang, 1991
Buku Teks