Working in English - Jones, Leo 1943- (Cambridge University Press, 2001)
La Biblioteca contiene: Teacher's book, Student's book, Student's book Audio CD set--Requisitos del sistema: PC Pentium II ó superior; 250 MB de espacio disponible en disco duro; Monitor SVGA de 16 bits a color 800 x 600 pixelesde resolución 64 MB de memoria RAM ; unidad de disco compacto ; windows 98 ; Acrobat Reader--ISBN 052177683X (Teacher's book with CD-ROM), ISBN 0521776848 (Student's book), ISBN 0521776813 (Student's book audio CD set)