Dean, Vera Micheles
Alfred A. Knopf, 1950
Buku Teks
East, Roger
Pinter Publishers, 1997
Buku Teks
Black C.E.
Rutgers Univ. Press, 1954, 1954
Buku Teks
Skilling, Gordon H.
Thomas Y. Crowell, 1966
Buku Teks
edited by Andrew Blasko, Diana Januauskiene
Council for Research in Values and Philosophy, 2008
Buku Teks