Não informado. (1968). Journal of Applied Behavior Analysis. Society for the Experimental Analysis of Behavior.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Applied Behavior Analysis. Lawrence, Kan: Society for the Experimental Analysis of Behavior, 1968.
Lua MLA (8ú heag.)Não informado. Journal of Applied Behavior Analysis. Society for the Experimental Analysis of Behavior, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.