Gordon, W. Terrence
Writer and Readers Pubishing, 1996
Buku Teks
edited by Ernst Cassirer; Paul Oskar Kristeller; John Herman Randall
University of Chicago Press, 1948
Buku Teks
Reichenbach, Hans
University of California Press, 1968
Buku Teks
Muhs, Karl
Duncker & Humblot, 1954
Buku Teks
Muhs, Karl
Duncker & Humblot, 1950
Buku Teks