por Chopra, Deepak [autor] | Zilli, Edith [traductor] | Chopra, Deepak. Ageless body, timeless mind.
por Salvador Carulla, Luis [editor] | Cano Sánchez, Alfredo [editor] | Cabo-Soler, José R [editor] | Gómez Gómez, R [colaborador].
por Walford, Roy L [autor] | Quirarte, Ignacio [traductor] | Walford, Roy L. Maximum life span.