Teaching classification in the 21 st century
Artikel Jurnal
Whither the Philippines in the 21 st century?
edited by Rodolfo C. Severino and Lorraine Carlos Salazar
ISEAS, 2007
Buku Teks
Tariq, Hussain
Diamond dilemma : shaping Korea for the 21 st Century
Random House, 2006
Buku Teks
Schuler, Randall S.
Human resource management : positioning for the 21 st century
West Publishing, 1996
Buku Teks
The Virtual university: organizing to survive in the 21 st century
Artikel Jurnal