Osborne, George Edward
West Publishing, 1951
Buku Referensi
Johnson, Alexender Sryan
Dover Publications, 1968
Buku Teks
Hart, Samuel L.
Philosophical Library, 1949
Buku Teks
Green, Richard
Academic Press, 2014
eBooks
Hume, David
Oxford University Press, 2000
Buku Teks