Bloomsbury professional, 2011
Buku Referensi
Pricewaterhouse coopers, 2011
Buku Referensi
Maria Steffi, author
Universitas Indonesia, 2012
UI - Skripsi Open
Anisa Tasya Priastika, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2012
UI - Skripsi Open
edited by by Thomas C. Grubb
Burgess, 1975
Buku Teks