APA-viite (7. p.)
NEEL, R., & BILLINGSLEY, F. (1991). IMPACT. A FUNCTIONAL CURRICULUM HANDBOOK FOR STUDENTS WITH MODERATE TO SEVERE DISABILITIES. PAUL H.BROOKES.
Chicago-viite (17. p.)
NEEL, R.S, ja F.F BILLINGSLEY. IMPACT. A FUNCTIONAL CURRICULUM HANDBOOK FOR STUDENTS WITH MODERATE TO SEVERE DISABILITIES. Londres: PAUL H.BROOKES, 1991.
MLA-viite (9. p.)
NEEL, R.S, ja F.F BILLINGSLEY. IMPACT. A FUNCTIONAL CURRICULUM HANDBOOK FOR STUDENTS WITH MODERATE TO SEVERE DISABILITIES. PAUL H.BROOKES, 1991.
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