Pieper, Josef
Justice
Pantheon Books, 1955
 Buku Teks SO
Justice
edited by Milton Fisk
Humanities Press, 1993
 Buku Teks SO
Wang, Lv
Justice
China Renmin University Press, 2015
 eBooks
Hubert, Charles I. (Charles Irving)
Preventive maintenance of electrical equipment
McGraw-Hill, 1969
 Buku Teks SO
Schneiderman, Lawrence J.
The practice of preventive health care
Addison-Wesley, 1981
 Buku Teks SO