edited by Kathleen E. Hug
Office of International Infrmation Programs US Department of State, [Date of publication not identified]
Buku Teks
edited by Nathan Glick
United Sates Information Agency, 1989
Buku Teks
United State Information Agency, 1994
Buku Teks
Schroeder, Richard C.
International Communicational Agency, [date of publication not identified]
Buku Teks
U.S. Information Service,, 1981
Buku Teks