by Falcomata, Terry S., Northup, John A., Dutt, Anuradha, Stricker, Jason M., Vinquist, Kelly M., Engebretson, Brenda J.
Published in Journal of applied behavior analysis (2008)

by Northup, John, Ehly, Stewart
Published in Encyclopedia of School Psychology (2005)

by NORTHUP, JR.; JOHN A
Year of Publication 11.11.1980