"Education Planner Self-Assessment" test is an option that is easy to administer. Other online tests and information are below.
INFORMATIVE WEBSITES: LEARNING STYLES / MULTIPLE INTELLIGENCES INVENTORIES, TESTS, ETC.
The books on this page are available from various book stores.
Learning Styles by Marlene LeFever (Jun 1, 1995)
Learning Style Perspectives: Impact in the Classroom by Lynne Celli Sarasin (Apr 30, 2006)
Ways of Learning: Learning Theories and Learning Styles in the Classroom (David Fulton Books) by Pritchard, Alan (Oct 29, 2008)
Differentiation Through Learning Styles and Memory by Sprenger, Marilee B. (Apr 22, 2008)
Learning Styles: What Are They? How Can They Help? by Diane Lamarche-Bisson (Apr 4, 2012)