al-Sīrāfī, A. Z., & Sulaymān, a.-t. 1. (9th-10th century). Ancient accounts of India and China, by two Mohammedan travellers, who went to those parts in the 9th century. (E. Renaudot, Trans.) London: S. Harding, 1733.

Ammous, S. (2018). The Bitcoin Standard: The Decentralized Alternative to Central Banking. New Jersey: John Wiley & Sons, Inc.

Bennett, N.R. (1970). Stanley's Despatches to the New York Herald, 1871-1872, 1874-1877. Boston: Boston University Press.

Bury, J.B. and Dalen, P. (2011). The Cambridge Medieval History, Volumes 1-5. Plantagenet Publishing.

Churchill, A. (1744). A Collection of Voyages and Travels, Some Now first Printed from Original Manuscripts, others Now first Published in English, Vol.V. London: Printed by assignment from Messrs. Churchill, for H. Lintot and John Osborn.

Dickson White, A. (1959). Fiat Money Inflation in France. New York: The Foundation for Economic Education, Inc.

Einzig, P. (1949). Primitive Money: In its Ethnological, Historical and Economic Aspects. London: Eyre & Spottiswoode.

Epstein, E.J. (2011). The Rise and Fall of Diamonds. Amazon Digital Services LLC. 

Francisco Alvares. (1540). Narrative of the Portuguese embassy to Abyssinia during the years 1520-1527. Translated by Lord Stanley of Alderley, London: Printed for the Hakluyt society.

Ibn Battúta. (1325-1354). Travels in Asia and Africa. Translated by H. A. R. Gibb. London: Routledge & Kegan Paul Ltd.

Ibn Batúta. (1325-1354). The Travels of Ibn Batuta. Translated by Samuel Lee. London: The Oriental Translation Committee.

Kloss, C.B. (1903). In The Andamans and Nicobars. London: John Murray 

Marco Polo. (1271-1295). The Book of Ser Marco Polo, the Venetian Vol I. Translated by Colonel Henry Yule, C.B. London: John Murray.

Marco Polo. (1271-1295). The Book of Ser Marco Polo, the Venetian Vol II. Translated by Colonel Henry Yule, C.B. London: John Murray. 

Menger, C. (1871). Principles of Economics. Translated by James Dingwall and Bert F. Hoselitz. Auburn: Ludwig von Mises Institute.

Pyrard, F. (1619). The Voyage of Francois Pyrard Vol I. Translated by Albert Gray. London: The Hakluyt Society.

Quiggin, A. H. (1949). A Survey of Primitive Money: The Beginnings of Currency. London: Methuen & Co. Ltd.

Schwartz, S.B. (2004). Tropical Babylons: Sugar and the Making of the Atlantic World, 1450-1680. The University of North Carolina Press.

Stanley, H.M. (1890). How I Found Livingstone: Travels, Adventures, and Discoveries in Central Africa. London: Sampson Low, Marston, Searle & Rivington.

Sykes, P. (1936). The Quest for Cathay. London: A. and C. Black 

Thomson, J. (1881). To the Central African Lakes and Back: The Narrative of the Royal Geographical Society's East Central African Expedition, 1878-1880. London: Sampson Low, Marston , Searle & Rivington.

Whitehead, G. (1914). In The Nicobar Islands. London: Seeley, Service & Co. Limited.

Wiston-Glynn, A.W. (1907). John Law of Lauriston, Financier and Statesman. Edinburgh: E. Saunders & Co