By Shaver, Dick..
México Prentice Hall 1998 .
xiv, 482 p. , Translation of : The next step in database marketing , c 1996. 24 cm..
9701701127(pbk.)

By Santrock, John W..
México McGraw-Hill 2005 .
xix, 531, [24] p. , Translation of : Psychology : essentials , 2nd. ed. 27 cm..
9701042220 (alk. paper)