Brophy, Peter
The library in the twenty-first century : new services for the information age
Library Association Publishing, 2002
 Buku Teks
Stachokas, George
After the book : information services for the twenty-first century
Chandos, 2014
 eBooks
Heye, Dennie
Characteristics of the successful twenty-first century information professional
Chandos Publishing, 2006
 Buku Teks
Pathways to industrialization in the twenty-first century : new challenges and emerging paradigms
edited by Adam Szirmai, Wim Naudé and Ludovico Alcorta
Oxford University Press, 2017
 Buku Teks
Perl, anthony
New Departures: rethinking rail passenger policy in the twenty-first century
The University Press, 2002
 Buku Teks