Langlois, C., & Seignobos, C. Introduction to the Study of History. Holt and Company.
Čikaški stil citiranja (17. izdanje)Langlois, Ch.V, i Ch Seignobos. Introduction to the Study of History. New York: Holt and Company.
MLA način citiranja (8. izdanje)Langlois, Ch.V, i Ch Seignobos. Introduction to the Study of History. Holt and Company.
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