Citazione Stile APA (7a Edizione)
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. T.F. Unwin.
Citazione stile Chigago Style (17a edizione)
Hardenburg, Walter Ernest. The Putumayo, the Devil's Paradise: Travels in the Peruvian Amazon Region and an Account of the Atrocities Committed upon the Indians Therein. London: T.F. Unwin, 1912.
Citatione MLA (9a ed.)
Hardenburg, Walter Ernest. The Putumayo, the Devil's Paradise: Travels in the Peruvian Amazon Region and an Account of the Atrocities Committed upon the Indians Therein. T.F. Unwin, 1912.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.