Hans Hagerdal, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2023
Artikel Jurnal
Rose, Gillian, author
SAGE, 2012
Buku Teks
Bekkers, Victor, author
Routledge, 2015
Buku Teks
edited by Deborah Cherry
Blackwell, 2005
Buku Teks
Mitchell, Michael N., author
Stata Press Publication, 2008
Buku Referensi