edited by Richard Haigh, Dai Harris
Routledge, 1994
Buku Teks SO
Cambridge Independence Educational Publishers 1994,
Buku Teks
Her Majesty's Stationery Office, 1955
Buku Teks SO
Gita Rustifar Rustana
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2012
UI - Skripsi Open
Sri Wahyuni
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2017
UI - Tesis Membership