Longman Scietific Technical, 1994
Buku Teks
Syadza Alifa, author
2018
UI - Tesis Membership
Routledge, 2023
eBooks
Paulus Wirutomo, author
Center for Social Well-being Studies , 2016
UI - Makalah dan Kertas Kerja
Universiti Malaysia Terengganu, 2013
Majalah, Jurnal, Buletin