edited by John A. Wiseman
Routledge, 1995
Buku Teks
The World Bank, 2008
Buku Teks
edited by Thomas A. Sebeok
Mouton, 1971
Buku Referensi
Esacove, Anne, author
Oxford University Press, 2016
eBooks
Rizky Ananda Wulan Sapta Rini, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
UI - Skripsi (Membership)