Birdsall, Stephen S.
Garis besar : geografi Amerika = Outline of American geography
John Wiley & Sons, 1992
 Buku Teks SO
Garis besar ekonomi Amerika Serikat = Outline of the U.S. economy
editor, Kathleen E. Hug; penerjemah, Sumantri Ar.
Office of International Infrmation Programs US Department of State, [date of publication not identified]
 Buku Teks SO
Garis besar sejarah Amerika
[publisher not identified], [date of publication not identified]
 Buku Teks
Garis besar : sejarah Amerika
[Publisher not identified], [Date of publication not identified]
 Buku Teks
McCan, Robert L.
Garis besar ekonomi Amerika
Dinas Penerangan Amerika Serikat Kedutaan Besar Amerika Serikat, 1991
 Buku Teks SO