McDougal, Myres S. (Myres Smith), 1906-1998
Yale University Press, 1967
Buku Teks
Stanford University Press, 1951
Buku Teks
Lasswell, Harold D.
The Viking Press, [date of publication not identified]
Buku Teks
Sage, 1982
Buku Teks
Robbins, Harold,
New English Library, 1982
Buku Teks