APA (7th ed.) Citation

Ore, Ø. (1988). Number theory and its history. Dover Publications.

Chicago Style (17th ed.) Citation

Ore, Øystein. Number Theory and Its History. New York: Dover Publications, 1988.

MLA (8th ed.) Citation

Ore, Øystein. Number Theory and Its History. Dover Publications, 1988.

Warning: These citations may not always be 100% accurate.