Hardenburg, W. E. (1912). The Putumayo: The devil's paradise. Travels in the peruvian Amazon region and an account of the atrocities committed upon the indians therein, together with extracts from the report of Sir Rogers Casement confirming the occurrences. T. Fisher Unwin.
Citazione stile Chigago Style (17a edizione)Hardenburg, W. E. The Putumayo: The Devil's Paradise. Travels in the Peruvian Amazon Region and an Account of the Atrocities Committed upon the Indians Therein, Together with Extracts from the Report of Sir Rogers Casement Confirming the Occurrences. London, England, United Kingdom: T. Fisher Unwin, 1912.
Citatione MLA (9a ed.)Hardenburg, W. E. The Putumayo: The Devil's Paradise. Travels in the Peruvian Amazon Region and an Account of the Atrocities Committed upon the Indians Therein, Together with Extracts from the Report of Sir Rogers Casement Confirming the Occurrences. T. Fisher Unwin, 1912.