Cita APA (7th ed.)

Porter, J., & Lacey, P. (2005). Researching learning difficulties: A guide for practitioners. P.C.P. ; SAGE Publications.

Cita Chicago (17th ed.)

Porter, Jill, i Penny Lacey. Researching Learning Difficulties: A Guide for Practitioners. London : Thousand Oaks, CA: P.C.P. ; SAGE Publications, 2005.

Cita MLA (8th ed.)

Porter, Jill, i Penny Lacey. Researching Learning Difficulties: A Guide for Practitioners. P.C.P. ; SAGE Publications, 2005.