Southeast Asia : challenges of the 21st century / by Janadas Devan
Institute of Southeast Asia Studies , 1994
 Buku Teks
Bouvier, Leon F.
World population : challenges for the 21st century
Seven Lucks Press, 1999
 Buku Teks
Sakhuja, Vijay
Asian maritime power in the 21st century: strategic transactions : China, India, and Southeast Asia
Institute of South East Asia Studies, 2011
 eBooks
Korea's strategic environment in the 21st century
 Artikel Jurnal
21st century Malaysia: challenges and strategies in attaining vision 2020 / edited by Michael Yeoh
Asean Academic Press , 2002
 Buku Teks