APA (7th ed.) Citation

Ore, Ø. (1967). Invitation to number theory. Mathematical Association of America.

Chicago Style (17th ed.) Citation

Ore, Øystein. Invitation to Number Theory. Washington, D.C.: Mathematical Association of America, 1967.

MLA (9th ed.) Citation

Ore, Øystein. Invitation to Number Theory. Mathematical Association of America, 1967.