Carter, Gwendolen M.
Harcourt Brace & World , 1967
Buku Teks
Carter, Gwendolen M.
Harcourt, Brace & World, 1962
Buku Teks
edited by Herbert J. Ellison
Westview Press, 1987
Buku Teks SO
Scalapino, Robert A.
University of California Press, 1975
Buku Teks SO
Scalapino, Robert A.
American Enterprise Institute for Public Police, 1972
Buku Teks SO