1. Albin, R. W., Horner, R. H., Koegel, R. L., & Dunlap, G. (Eds.). (1987). Extending competent performance: Applied research on generalization and maintenance. University of Oregon, Specialized Training Program.
2. Behavior Analyst Certification Board (BACB). (2012). Behavior analyst task list (4th ed.). https://www.bacb.com/wpcontent/ uploads/2020/05/BCBA-BCaBA-task-list-fourth-edition-english.pdf.
3. Behavior Analyst Certification Board (BACB). (2017). Behavior analyst task list (5th ed.). https://www.bacb.com/wpcontent/ uploads/2020/08/BCBA-task-list-5th-ed-200818.pdf.
4. Chadsey-Rusch, Drasgow, E., Reinoehl, B., & Halle, J. (1993). Using general-case instruction to teach spontaneous and generalized requests for assistance to learners with severe disabilities. Journal of the Association for Persons with Severe Handicaps, 18(3), 177–187.
5. Chadsey-Rusch, J., & Halle, J. (1992). The application of general-case instruction to the requesting repertoires of learners with severe disabilities. Journal of the Association for Persons with Severe Handicaps, 17(3), 121–132.