Usabilidad & Formularios

Label placement in Forms

http://www.uxmatters.com/mt/archives/2006/07/label-placement-in-forms.php

Libro: Web Form Design Filling in the Blanks http://db.tt/GzIR4yxN

Percepción visual (princicios)

http://www.lukew.com/ff/entry.asp?981