एपीए उद्धरण

Sibelius, P. (1990). Natural contradictions and the concept of action in mechanics. Acta Academiae Aboensis : Ser. B 50,2.

शिकागो स्टाइल उद्धरण

Sibelius, Patrick. "Natural Contradictions and the Concept of Action in Mechanics." Acta Academiae Aboensis : Ser. B 50,2 1990.

एमएलए उद्धरण

Sibelius, Patrick. "Natural Contradictions and the Concept of Action in Mechanics." Acta Academiae Aboensis : Ser. B 50,2 1990.