Sherrard, Philip
Time-Life International, 1967
Buku Teks
Constable, George
Time-life Int. (Nederland)B.V., 1974
Buku Teks
Leonard, Jonathan Norton
Time-Life Books, 1973.
Buku Teks
Edey, Maitland A. (Amstrong), 1910-
Time-Life Books, 1975
Buku Teks
Perl, Philip.
Time-Life Books, 1979
Buku Referensi