Não informado. (1987). Nature, Society and Thought. Marxist Educational Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Nature, Society and Thought. Minneapolis, Minn: Marxist Educational Press, 1987.
Lua MLA (8ú heag.)Não informado. Nature, Society and Thought. Marxist Educational Press, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.