APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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