Book Antiqua  Sugerido por SexyElvis7 

Based on the spacing between the A and W, this is most likely Book Antiqua by Microsoft/Monotype, bundled in Windows, MS Office and other Microsoft products.

Same design: Palatino, Zapf Calligraphic, TeX Gyre Pagella and others

See Palatino on Wikipedia for more information
http://en.wikipedia.org/wiki/Palatino

Thanks Elvis!