edited by David Baker and Wendy Evans
Emerald, 2017
eBooks
Stern, David, author
Chandos, 2013
eBooks
Sanjay Kataria; B.S. Nigam; Rama Kant Shukla, editor
KBD Publications, 2009
Buku Teks
Totterdell, Anne, author
Library Association Publishing, 2000
Buku Teks
Bowker-Saur, 2018
Majalah, Jurnal, Buletin