Noguchi, Yone
The spirit of Japanese art
John Murray, 1915
 Buku Teks
Rowse, Alfred Leslie, 1903-1997
The english spirit : essays in history and literature
Macmillan, 1950
 Buku Teks
Priestley, J. B. (John Boynton), 1894-1984
Literature and Western man
Harper, 1960
 Buku Teks
The world's great thinkers: Man and Spirit; the speculative philosophers
ed. by Saxe Commins & Robert N. Linscott.
Random House , 1947
 Buku Teks
Stein, Sherman K.
Mathematics : the man-made universe, an introduction to the spirit of mathematics
W.H. Freeman, 1969
 Buku Teks SO