Ore, Ø. (1967). Invitation to number theory. Mathematical Association of America.
Lua i Stíl Chicago (17ú heag.)Ore, Øystein. Invitation to Number Theory. Washington: Mathematical Association of America, 1967.
Lua MLA (8ú heag.)Ore, Øystein. Invitation to Number Theory. Mathematical Association of America, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.