written and researched by Mara Vorhees, Leonid Ragozin [written and researched by Marc Di Luca, Leonid Ragozin [written and researched by Marc Di Luca, Leonid Ragozin]. this edition written and researched by Mara Vorhees, Leonid Ragozin. written and researched by Mara Vorhees [and others]. this edition written and researched by Marc Di Duca, Leonid Ragozin written and researched by Sara Benson written and researched by Sara Benson... [et al. written and researched by Sara Benson...[et al. written and researched by Sara Benson...[et al.]