By Gloucestershire college
By Microsoft
By The Open University
By Various
By Ullman, Larry
By Nixon, Robin
By Giovanni DiFeterici
By Frain, Ben
By Sperling, Dave
By Larsen, John R
By Young Rewired State, Beedie, Duncan
By Stein, Lincoln D.
By Glendinning, Eric H., McEwan, John
By Lipschutz, Seymour
By Jacquelyne A. Morison
By P. A. Murphy & E. Barlow
By Elizabeth Roberts
By Doreen Sharp, Doreen Trimnell
By W & E Walmsley
By Bessant, Angela
By South, M.L.
By Vibrant Publishers
By Robins, Kevin, Webster, Frank
By Bostrom, Nick
By Sardar, Ziauddin
By Bluttman, Ken
By Graydon, Danny, Hed, Mikael
By Michael Halvorson