Duffield, A. J. (1877). Peru in the guano age. Being a short account of a recent visit to the guano deposits with some reflections on the money they have produced and the uses to wich it has been applied (1a. ed.). Richard Bentley and son, publishers in ordinary to Her Majestiy the Queen.
Tohutoru Kātū Chicago (17th ed.)Duffield, A. J. Peru in the Guano Age. Being a Short Account of a Recent Visit to the Guano Deposits with Some Reflections on the Money They Have Produced and the Uses to Wich It Has Been Applied. 1a. ed. Londres: Richard Bentley and son, publishers in ordinary to Her Majestiy the Queen, 1877.
Tohutoro MLA (9th ed.)Duffield, A. J. Peru in the Guano Age. Being a Short Account of a Recent Visit to the Guano Deposits with Some Reflections on the Money They Have Produced and the Uses to Wich It Has Been Applied. 1a. ed. Richard Bentley and son, publishers in ordinary to Her Majestiy the Queen, 1877.