Wilson, Edmund, 1895-1972
Charles Scribner's Sons, 1953
Koleksi Publik
Williams, Harold Herbert
Sidgwick & Jackson, 1918
Buku Teks SO
Robert M. Hutchins, Mortimer J. Adler, editors in chief
Encyclopaedia Britannica, Inc., 1963
Buku Referensi
Robert M. Hutchins, Mortimer J. Adler, editors in chief
Encyclopaedia Britannica, Inc., 1963
Buku Referensi
Robert M. Hutchins, Mortimer J. Adler, editors in chief
Encyclopaedia Britannica, Inc., 1963
Buku Referensi