एपीए उद्धरण

Struwe, M. (1990). Variational methods. Springer-Verlag.

शिकागो स्टाइल उद्धरण

Struwe, Michael. Variational Methods. Berlin: Springer-Verlag, 1990.

एमएलए उद्धरण

Struwe, Michael. Variational Methods. Springer-Verlag, 1990.