Pro-Ed (Firm) & Hammill Institute on Disabilities. (1999). Journal of positive behavior interventions. Pro-Ed.
Lua i Stíl Chicago (17ú heag.)Pro-Ed (Firm) agus Hammill Institute on Disabilities. Journal of Positive Behavior Interventions. Austin, TX: Pro-Ed, 1999.
Lua MLA (9ú heag.)Pro-Ed (Firm) agus Hammill Institute on Disabilities. Journal of Positive Behavior Interventions. Pro-Ed, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.