Burke, Peter
Princeton University Press, 1986
Buku Teks
Hale, John R., author
Time-Life International, 1969
Buku Teks
Lucas, Henry S., author
Harper and Row, 1960
Buku Teks
Oxford University Press , 1990
Buku Teks
Sichel, Edith
Oxford University Press, 1959
Buku Teks