Dulles, Foster Rhea
Houghton-Mifflin, 1945
Buku Teks
Schaller, Michael
Oxford University press, 1979
Buku Teks
Hu, Fengxiang
shanghai renmin Chubansh, 2000
Buku Teks
Margolies, Edward
Lippincott, 1969
Buku Teks
Bonner, Thomas Neville
Prentice-Hall, 1963
Buku Teks