Não informado. (1987). Nature, Society and Thought. Marxist Educational Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Nature, Society and Thought. Minneapolis, Minn: Marxist Educational Press, 1987.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Nature, Society and Thought. Marxist Educational Press, 1987.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.