Παραπομπή σε μορφή APA (7η εκδ.)
HARRIS, J. (1996). PURCHASING SERVICES FOR PEOPLE WITH LEARNING DISABILITIES, CHALLENGING BEHAVIOUR AND MENTAL HEALTH NEEDS. British Institute of Learning Disabilities.
Παραπομπή σε μορφή Chicago (17η εκδ.)
HARRIS, J. PURCHASING SERVICES FOR PEOPLE WITH LEARNING DISABILITIES, CHALLENGING BEHAVIOUR AND MENTAL HEALTH NEEDS. WORCESTERSHIRE (UK): British Institute of Learning Disabilities, 1996.
Παραπομπή σε μορφή MLA (9th εκδ.)
HARRIS, J. PURCHASING SERVICES FOR PEOPLE WITH LEARNING DISABILITIES, CHALLENGING BEHAVIOUR AND MENTAL HEALTH NEEDS. British Institute of Learning Disabilities, 1996.
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