ISBN: 978-4-87424-402-9 // ISBN: 9784874244029Year of publication: 2008Publisher: KurosioNumber of pages: 281 + 22 (answer key)Languages: English, Korean, Portuguese, Spanish Country of origin: Japan
ISBN: 978-4-87424-481-4 // ISBN: 9784874244814 Year of publication: 2010Publisher: KurosioNumber of pages: 219 (Main book ) + 16 (answer key)Languages: Spanish, English, Korean, Portuguese and JapaneseCountry of origin: Japan
ISBN: 978-4-88319-626-5// ISBN: 9784883196265Year of publication: 2013Publisher: 3A CorporationNumber of pages: 184Languages: Portuguese and JapaneseCountry of origin: Japan
ISBN: 978-4-87217-794-7 // ISBN: 9784872177947Year of publication: 2011Publisher: ASKNumber of pages: 162Languages: Japanese, English, PortugueseCountry of origin: Japan