Gregory, F. (1977). Scientific materialism in nineteenth century Germany. D. Reidel Publishing Company.
Citazione stile Chigago Style (17a edizione)Gregory, Frederick. Scientific Materialism in Nineteenth Century Germany. Dordrecht ; Boston: D. Reidel Publishing Company, 1977.
Citatione MLA (9a ed.)Gregory, Frederick. Scientific Materialism in Nineteenth Century Germany. D. Reidel Publishing Company, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.