Nef, Jorge
Ethics and technology : ethical choices in the age of pervasive technology
Wall & Thomson, 1989
 Buku Teks SO
Tahkur, Ramesh
In defence of New Zealand : foreign policy choices in the Nuclear Age
Westview Press, 1986
 Buku Referensi
Click, Phyllis
Caring for school-age children
Wadsworth/Clengage Learning , 2012
 Buku Teks SO
Norris, Pippa
Sacred and secular
Cambridge University Press, 2004
 Buku Teks SO
Stewart, Rosemary
Choices for the manager
Prentice-Hall, 1982
 Buku Teks