APA (7th ed.) Citation

Brehier, E. (1968). The Nineteenth century: Period of systems, 1800-1850. University of Chicago Press.

Chicago Style (17th ed.) Citation

Brehier, Emile. The Nineteenth Century: Period of Systems, 1800-1850. Chicago: University of Chicago Press, 1968.

MLA (9th ed.) Citation

Brehier, Emile. The Nineteenth Century: Period of Systems, 1800-1850. University of Chicago Press, 1968.