एपीए उद्धरण

Helffer, B., & Nier, F. (2005). Hypoelliptic estimates and spectral theory for Fokker-Planck operators and Witten Laplacians. Springer.

शिकागो स्टाइल उद्धरण

Helffer, Bernard, और Francis Nier. Hypoelliptic Estimates and Spectral Theory for Fokker-Planck Operators and Witten Laplacians. Berlin ; New York: Springer, 2005.

एमएलए उद्धरण

Helffer, Bernard, और Francis Nier. Hypoelliptic Estimates and Spectral Theory for Fokker-Planck Operators and Witten Laplacians. Springer, 2005.