Skinner, B. F. (1948). Walden Two. Macmillan.
Lua i Stíl Chicago (17ú heag.)Skinner, B F. Walden Two. New York: Macmillan, 1948.
Lua MLA (9ú heag.)Skinner, B F. Walden Two. Macmillan, 1948.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.