Skinner, B. F. (2014). walden two. Macmillan.
Lua i Stíl Chicago (17ú heag.)Skinner, B. F. Walden Two. New York: Macmillan, 2014.
Lua MLA (9ú heag.)Skinner, B. F. Walden Two. Macmillan, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.