Winfield, Gerald F.
William Sloane Associates, Inc., 1948
Buku Teks
Cressey, Geoge Babcock, author
McGraw-Hill, 1934
Buku Teks
McCarthy, John F.
ISEAS Yusof Ishak Institute, 2016
Buku Teks
Gutmacher, Alan F.
Balantine Books, 1961
Buku Teks
Chesneaux, Jean, author
Pantheon Books, 1979
Buku Teks