this edition written and researched by Alison Bing, Paula Hardy. this edition written and researched by Cristian Bonetto, Paula Hardy. this edition written and researched by Alison Bing...[et al.] this edition written and researched by Sarina Singh ...[et al.] this edition written and researched by Sarina Singh...[et al.] this edition written and researched by Neil Wilson, Mark Baker this edition written and researched by Paul Harding this edition written and researched by Simon Richmond [et al...] this edition written and researched by Jenny Walker, Paul Clammer this edition written and researched by Emilie Filou ... [et al.].