Elton, G. R. (Geoffrey Rudolph), author
Cambridge University Press, 1972
Buku Teks
H.Bainton, Roland H., author
D. Van Nostrand , 1956
Buku Teks
Huizinga, Johan, author
Harper & Row, 1957
Buku Teks
Durant, Will, author
Simon and Schuster, 1963
Buku Teks
Simon, Edith, author
Time-Life Books, 1967
Buku Teks