editor, Kathleen E. Hug; penerjemah, Sumantri Ar ... [et al.]
Office of International Infrmation Programs US Department of State, [Date of publication not identified]
Buku Teks SO
McCan, Robert L.
Dinas Penerangan Amerika Serikat Kedutaan Besar Amerika Serikat, 1991
Buku Teks SO
Schroeder, Richard C.
Kantor Program Informasi Internasional Departemen Luar Negeri Amerika Serikat, [Date of publication not identified]
Buku Teks
Departemen Luar Negeri Amerika Serikat, 1991
Buku Teks
Birdsall, Stephen S.
John Wiley & Sons, 1992
Buku Teks SO