Porterfield, J. (1987). Positive monitoring: A method of supporting staff and improving services for people with learning disabilities (1. publ.). BIMH Publ.
Chicago-Zitierstil (17. Ausg.)Porterfield, Jan. Positive Monitoring: A Method of Supporting Staff and Improving Services for People with Learning Disabilities. 1. publ. Kidderminster: BIMH Publ, 1987.
MLA-Zitierstil (9. Ausg.)Porterfield, Jan. Positive Monitoring: A Method of Supporting Staff and Improving Services for People with Learning Disabilities. 1. publ. BIMH Publ, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.