written and researched by Cristian Bonetto [and9 others]. written and researched by Cristian Bonetto and Helena Smith. written and researched by Cristian Bonetto and Helena Smith written and researched by Cristian Bonetto, Paula Hardy written and researched by Mara Vorhees [and others]. written and researched by Cristian Bonetto... [et al.] written and resarched by Regis St Louis [and 5 others]. this edition written and researched by Cristian Bonetto [and nine others] written and researched by Simon Richmond [and 11 others]. written & researched by Cristian Bonetto... [ea al.]