Hale, John R.
Time-Life International, 1969
Buku Teks
Lucas, Henry S.
Harper and Row, 1960
Buku Teks
Sichel, Edith
Oxford University Press, 1959
Buku Teks
Grant, Patrick
Macmillan Press, 1979
Buku Teks
Livingston, Kathryn
Rockport Publishers, 1999
Buku Teks