Mary Pagliero Popp; Diane Dallis, editor
IGI Global, 2012
Buku Teks
Luluk Tri Wulandari, author
2016
UI - Makalah dan Kertas Kerja
Davidsen, Susanna, author
[American Library association, American Library association], 2004
eBooks
Varnum, Kenneth J., author
Learning Matters, 2012
Buku Teks
University of Bath, 1985
Buku Referensi