Mayer, Frederick
American Book Company, 1950
Buku Teks
Windelband, Wilhelm
Dover, 1956
Buku Teks
Gomperz, Theodor
John Murray , 1955
Buku Teks
edited by John K. Ryan
The Catholic University of America Press, 1963
Buku Teks
Bentley, John Edward
Littlefield, Adams, 1958
Buku Teks