editor Joseph G. E.Hopkins
Charles Scribner's Sons, 1964
Buku Referensi
edited by Phyllis Hartnoll and Peter Found
Oxford University Press , 1992
Buku Referensi
United State Information Agency, 1994
Buku Teks
edited by Richard M. Ludwig, Clifford A. Nault
Oxford University Press , 1986
Buku Referensi
Shirley Chew, David Richards
West Sussex John Wiley & Sons Inc., 2014
Buku Teks