Booth, Alan R.
Westview Press, 1983
Buku Teks
Parkin, Andrew
Macmillan, 1982
Buku Teks
Ranny, Austin
Prentince-Hall, 1987
Buku Teks
Didi Ristanto
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2023
UI - Tesis Membership
Council for Research in Values and Philosophy, 2007
Buku Teks