Pojman, Louis P., author
Thomson Wadsworth, 2006
Buku Teks
Cornman, James W., author
Macmillan, 1968
Buku Teks
Hospers, John, author
Roudledge, 1988
Buku Teks
Pisarev, Dmitry, author
Foreign Languages Publishing House, 1958
Buku Teks
Chernyshevsky, N. G.
Foreign Languages Publishing House, 1953
Buku Teks