Peso (yang berarti berat dalam bahasa Spanyol) adalah nama dari sebuah koin yang berasal dari Spanyol dan menjadi penting dan besar di dunia internasional. Peso sekarang ini menjadi nama unit moneter di beberapa bekas koloni Spanyol.
Chalmers, Robert (1893), History of currency in the British colonies, London: Eyre and Spottiswoode for Her Majesty's Stationery Office, hlm. 5–24, 101–105, 390–396.
Frey, Albert R. (1916), "A dictionary of numismatic names: their official and popular designations", American Journal of Numismatics, I: 176, 180.
Sédillot, René (1955), Toutes les monnaies du monde, Paris: Recueil Sirey, hlm. 149, 171–172, 383–385, 406–407.
Shaw, W.A. (1896, reprinted 1967), The history of currency 1251 to 1894: being an account of the gold and silver moneys and monetary standards of Europe and America, together with an examination of the effects of currency and exchange phenomena on commercial and national progress and well-being, New York: G.P. Putnam's Sons, reprinted by Augustus M. Kelley, hlm. 328–333, LC 67-20086Periksa nilai tanggal di: |date= (bantuan).