Tomlan, Michael A., author
Springer International Publishing, 2015
eBooks
Farmer, Beverley
Penguin Books, 1984
Buku Teks
Orleans, Leo A.
Stanford University Press, 1972
Buku Teks
Artikel Jurnal
Gusti Nita Amalia, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2016
UI - Skripsi (Membership)