Silberg, Richard
The devolution of the people
Harcourt, Brace & World, 1967
 Buku Teks SO
Burns, James McGregor
Government by the people
Prentice-Hall, 1972
 Buku Teks SO
Halsey, George D.
Supervising people
Harper & Brothers, 1946
 Buku Teks
Newell, Kenneth W.
Health by the people
World Health Organization, 1975
 Buku Teks SO
Dangerous people
Blackstone Press Limited, 1996
 Buku Teks SO