APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

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