Friis, Robert H.
MA : Jones & Bartlett Learning, 2012
Buku Teks SO
Aish Baity Kurnia
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2017
UI - Skripsi Membership
Ratcliffe, J. M.
Ellis Horwood, 1981
Buku Teks SO
Maxwell, Nancy Irwin
Jones & Bartlett Learning, 2014
Buku Teks SO
Rowland, Anthony J.
Edward Arnold, 1985
Buku Teks