written and researched by Charles Rawlings-Way [and others] written and researched by Charles Rawlings-Way [and 5 others]. this edition written and researched by Charles Rawlings-Way [and 4 others]. written and researched by Sarina Singh [and others] this edition written and researched by Charles Rawlings-Way [and six others] written and researched by Nicola Williams ... [and others] written and researched by Sara Benson and 6 others. written and researched by China Williams [and 9 others]. [this edition written and researched by Charles Rawlings-Way ... et al.] written and researched by Oliver Berry [and nine others]