Não informado. (1963). Explorations in Entrepreneurial History. Earlham College.
Chicago-Zitierstil (17. Ausg.)Não informado. Explorations in Entrepreneurial History. Richmond, Ind: Earlham College, 1963.
MLA-Zitierstil (8. Ausg.)Não informado. Explorations in Entrepreneurial History. Earlham College, 1963.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.