Heneman, Herbert Gerhard, 1944-
McGraw-Hill, 2003
Buku Teks SO
Heneman, Herbert Gerhard, 1944-
McGraw-Hill, 2009
Buku Teks SO
March, James G.
Wiley, 1950
Buku Teks SO
by Bradley D. Nash with Milton S. Eisenhower, R. Gordon Hoxie, and William C. Spragens
Center for the study of the Presidency, 1980
Buku Teks SO
NCC Publications, 1983
Buku Teks SO