English id 3b student´s & workbook second edition
Autor:Seligson, Paul; Barros, Luiz OtávioEnglish id 3a student´s & workbook second edition
Autor:Seligson, Paul; Barros, Luiz OtávioEnglish id 3 workbook second edition
Autor:Barros, Luiz OtávioEnglish id 3 student´s book second ed
Autor:Lethaby, Carol; Barros, Luiz OtávioPersonal best american b2 upper-intermediate student's book
Autor:Barros, Luiz OtávioPersonal best american b1+ intermediate workbook
Autor:Barros, Luiz Otávio