Pro-Ed (Firm) & Hammill Institute on Disabilities. (1999). Journal of positive behavior interventions. Pro-Ed.
Chicago-viite (17. p.)Pro-Ed (Firm) ja Hammill Institute on Disabilities. Journal of Positive Behavior Interventions. Austin, TX: Pro-Ed, 1999.
MLA-viite (9. p.)Pro-Ed (Firm) ja Hammill Institute on Disabilities. Journal of Positive Behavior Interventions. Pro-Ed, 1999.
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