Moonitz, Maurice
New York, N.Y. Garland Publishing 1990,
Buku Teks
Parmelee, Maurice
Philosiphical Library, 1960
Buku Teks
Trigger, Bruce G., author
Cambridge University Press, 2006
Buku Teks
edited by Isaac Kramnick
[publisher not identified], 1969
Buku Teks
Wanlass, Lawrence C., author
Appleton-Century-Crofts, 1953
Buku Teks