Bromley, Peter, author
E & FN Spon, 1997
Buku Teks
Taylor and Francis,
Majalah, Jurnal, Buletin
Toynbee, Arnold J., translator
Osford University Press, 1969
Buku Teks
Giuseppe Amoruso, Rossella Salerno, editors
Springer Nature, 2019
eBooks
Simatupang, Tresia Kesti Magdalena, author
Fakultas Teknik Universitas Indonesia, 2013
UI - Skripsi (Membership)