APA
Ewa Zarkowska and John Clements, . (1988). Problem behaviour in people with severe learning disabilities : a practical guide to a constructional approach. Croom Helm, London: .
Chicago
Ewa Zarkowska and John Clements, . 1988. Problem behaviour in people with severe learning disabilities : a practical guide to a constructional approach. Croom Helm, London: .
Harvard
Ewa Zarkowska and John Clements, . (1988). Problem behaviour in people with severe learning disabilities : a practical guide to a constructional approach. Croom Helm, London: .
MLA
Ewa Zarkowska and John Clements, . Problem behaviour in people with severe learning disabilities : a practical guide to a constructional approach. Croom Helm, London: . 1988.