Leakey, Richard
Tian xia wen hua chu ban gu fen you xian gong si, 1995
Buku Teks
Coon, Carleton S., author
Alfred A. Knopf, 1962
Buku Teks
McKee, Jeffrey K., author
Pearson/Prentice Hall, 2005
Buku Teks
Howells, William D., author
Doubleday, 1967
Buku Teks
Brace, C. Loring, author
Prentice-Hall, 1979
Buku Teks