Science and Right Results: PBS and Human Dignity, A. Turnbull and H.R. Turnbull in Journal of Positive Behavior Intervention, Volume 20, Number 10, 2010, Box: 2, Folder: 34. Personal papers of Rud Turnbull, PP 511. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/304920 Accessed June 16, 2025.