Koht, H. 1., & Haugen, E. 1. (1964). Driving forces in history =: Drivmakter i historia, Oslo, 1959. Cambridge, Massachusetts: Harvard University Press.
Chicago Style CitationKoht, Halvdan 1873-1965, and Einar 1906-1994 Haugen. Driving Forces in History =: Drivmakter I Historia, Oslo, 1959. Cambridge, Massachusetts: Harvard University Press, 1964.
MLA CitationKoht, Halvdan 1873-1965, and Einar 1906-1994 Haugen. Driving Forces in History =: Drivmakter I Historia, Oslo, 1959. Cambridge, Massachusetts: Harvard University Press, 1964.
Warning: These citations may not always be 100% accurate.