Citazione Stile APA (7a Edizione)

Langlois, C., & Seignobos, C. Introduction to the Study of History. Holt and Company.

Citazione stile Chigago Style (17a edizione)

Langlois, Ch.V, e Ch Seignobos. Introduction to the Study of History. New York: Holt and Company.

Citatione MLA (8a ed.)

Langlois, Ch.V, e Ch Seignobos. Introduction to the Study of History. Holt and Company.