Inyoung Hwang, author
Seoul National University, 2018
Artikel Jurnal
Devyna Fenty, author
2020
UI - Tugas Akhir
De Blij, Harm J., author
Oxford, 2005
Buku Teks
Cambridge University Press, 2007
Buku Teks
Otto-Zimmermann, Konrad, editor
Springer, 2012
eBooks