Hobsons Pub.,, 1987
Buku Referensi
Scott, Ronaldo Mota David
Elsevier, 2014
eBooks
edited by Kathy Ennis
Library Association Publishing, 2000
Buku Teks
Tooley, James
Continuum Studies Education Policy, 2000
Buku Teks
Brereton, Pat
Continuum, 2005
Buku Teks