एपीए उद्धरण

Helgaker, T., Jørgensen, P., & Olsen, J. (2000). Molecular electronic-structure theory. Wiley.

शिकागो स्टाइल उद्धरण

Helgaker, Trygve, Poul Jørgensen, और Jeppe Olsen. Molecular Electronic-structure Theory. New York: Wiley, 2000.

एमएलए उद्धरण

Helgaker, Trygve, et al. Molecular Electronic-structure Theory. Wiley, 2000.