edited by Anne-Marie Feyer and Ann Williamson
Taylor and Francis, 1998
Buku Teks
Asfahl, C. Ray
Pearson/Prentice Hall, 2004
Buku Teks SO
Ari Omar Mochtar
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2022
UI - Tesis Membership
Anton, Thomas J.
McGraw-Hill, 1979
Buku Teks
DeReamer, Russell
John Wiley & Sons, 1980
Buku Teks SO