editor, William Chester Jordan
Charles Scribner's Sons, 1996
Buku Referensi
Kirchner, Walther
Barnes & Noble. INC, 1968
Buku Teks
Easton, Stewart C., author
Holt, Rinehart and Winston, 1955
Buku Teks
Coote, Stephen, author
Penguin Group, 1988
Buku Teks
Erlande-Brandenburg, Alain
Thames & Hudson, 1995
Buku Teks