Hoffman, Edwin D., author
Lancer Books, 1964
Buku Teks
Fromm, Erich, author
London and New York : Routledge, 2002
Buku Teks
Sen, Amartya, 1933-, author
Oxford University Press, 2002
Buku Teks
Sen, Amartya, 1933-, author
Knopf, 1999
Buku Teks
Fromm, Erich, author
Routledge & Kegan Paul, 1950
Buku Teks