Chulalongkorn University, 2015
Buku Teks
Anders Biel, Daniel Eek, Tommy Garling, Mathias Gusgsson, editor
Springer, 2008
Buku Teks
Owen, Robert
J.M. Dent & Sons , 1949
Buku Teks SO
Prokhorova, Anna, author
United Nations Publications, 2017
Artikel Jurnal
Allen, T. Harrell, author
Praeger, 1978
Buku Teks