edited by Dagobert D. Runes
Littlefield, Adams, 1962
Buku Teks
Edited by Dagobert D. Runes
Philosophical Library, 1947
Buku Teks
Mayer, Frederick, author
American Book Company, 1951
Buku Teks
Mayer, Frederick, author
American Book Company, 1951
Buku Klasik
edited by A.P. Martinich
Blackwell, 2007
Buku Teks