Schumpeter, Joseph A. (1994), „Part II From the Beginning to the First Classical Situation (to about 1790), chapter 2 The scholastic Doctors and the Philosophers of Natural Law”, History of Economic Analysis, стр. 74—75, ISBN978-0-415-10888-1, OCLC269819. In the footnote, Schumpeter refers to Usher, Abbott Payson (1943). The Early History of Deposit Banking in Mediterranean Europe. Harvard economic studies ;v. 75. Harvard university press. and de Roover, Raymond (децембар 1942). „Money, Banking, and Credit in Medieval Bruges”. Journal of Economic History. 2, supplement S1: 52—65. doi:10.1017/S0022050700083431.
Schumpeter, Joseph A. (1994), „Part II From the Beginning to the First Classical Situation (to about 1790), chapter 2 The scholastic Doctors and the Philosophers of Natural Law”, History of Economic Analysis, стр. 74—75, ISBN978-0-415-10888-1, OCLC269819. In the footnote, Schumpeter refers to Usher, Abbott Payson (1943). The Early History of Deposit Banking in Mediterranean Europe. Harvard economic studies ;v. 75. Harvard university press. and de Roover, Raymond (децембар 1942). „Money, Banking, and Credit in Medieval Bruges”. Journal of Economic History. 2, supplement S1: 52—65. doi:10.1017/S0022050700083431.
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„Protestant Ethic”. Believe: Religious Information Source. Архивирано из оригинала 19. 08. 2017. г. Приступљено 17. 03. 2020.
Schumpeter, Joseph A. (1994), „Part II From the Beginning to the First Classical Situation (to about 1790), chapter 2 The scholastic Doctors and the Philosophers of Natural Law”, History of Economic Analysis, стр. 74—75, ISBN978-0-415-10888-1, OCLC269819. In the footnote, Schumpeter refers to Usher, Abbott Payson (1943). The Early History of Deposit Banking in Mediterranean Europe. Harvard economic studies ;v. 75. Harvard university press. and de Roover, Raymond (децембар 1942). „Money, Banking, and Credit in Medieval Bruges”. Journal of Economic History. 2, supplement S1: 52—65. doi:10.1017/S0022050700083431.