Não informado. (1963). Explorations in Entrepreneurial History. Earlham College.
Citace podle Chicago (17th ed.)Não informado. Explorations in Entrepreneurial History. Richmond, Ind: Earlham College, 1963.
Citace podle MLA (8th ed.)Não informado. Explorations in Entrepreneurial History. Earlham College, 1963.
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