edited by Dagobert D. Runes and Harry G. Schrickel
Philosophical Library, 1946
Buku Referensi
edited by Robin Osborne and Jeremy Tanner
Blackwell Publishing, 2007
Buku Teks
Meridiana, 1967
Buku Teks
Piata Scinteii, 1958
Buku Teks
[publisher not identified], [date of publication not identified]
Buku Teks