Sakharov, A. D. (1968). Progress, coexistence & intellectual freedom. W.W.Norton & Co..
Lua i Stíl Chicago (17ú heag.)Sakharov, Andrei D. Progress, Coexistence & Intellectual Freedom. New York: W.W.Norton & Co., 1968.
Lua MLA (9ú heag.)Sakharov, Andrei D. Progress, Coexistence & Intellectual Freedom. W.W.Norton & Co., 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.