Não informado. (1987). Nature, Society and Thought. Marxist Educational Press.
Chicago-Zitierstil (17. Ausg.)Não informado. Nature, Society and Thought. Minneapolis, Minn: Marxist Educational Press, 1987.
MLA-Zitierstil (8. Ausg.)Não informado. Nature, Society and Thought. Marxist Educational Press, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.