APA

Koht H., . (1964). Driving forces in history: Drivmakter i historia, Oslo, 1959. Cambridge: Belknap Press of Harvard University Press.

Chicago

Koht Halvdan, . 1964. Driving forces in history: Drivmakter i historia, Oslo, 1959. Cambridge: Belknap Press of Harvard University Press.

Harvard

Koht H., . (1964). Driving forces in history: Drivmakter i historia, Oslo, 1959. Cambridge: Belknap Press of Harvard University Press.

MLA

Koht Halvdan, . Driving forces in history: Drivmakter i historia, Oslo, 1959. Cambridge: Belknap Press of Harvard University Press. 1964.