Cita APA (7a ed.)

Porter, J., & Lacey, P. (2005). Researching learning difficulties: A guide for practitioners. Paul Chapman Pub..

Cita Chicago Style (17a ed.)

Porter, Jill, y Penny Lacey. Researching Learning Difficulties: A Guide for Practitioners. London ; Thousand Oaks, Calif.: Paul Chapman Pub., 2005.

Cita MLA (8a ed.)

Porter, Jill, y Penny Lacey. Researching Learning Difficulties: A Guide for Practitioners. Paul Chapman Pub., 2005.