Challenges facing the open University: The case of the Korea National open University
 Artikel Jurnal
Challenges facing nurses' associations and unions a global perspective
 Artikel Jurnal
Governance in Indonesia : challenges facing the Megawati Presidency
edited by Hadi Soesastro, Anthony L. Smith, Han Mui Ling
Institute of southeast Asian Studies, 2003
 Buku Teks SO
Challenges for women: women's studies in Korea
edited by Chung Sei-wha; transled by Shin Chang-hyun ... [and others]
Ewha Womens University Press, 1986
 Buku Teks SO
Korea's options for facing china's economic challenge
 Artikel Jurnal