APA (7th ed.) Citation

Hopkins, P. F., & Springel, V. (2005). Luminosity-dependent quasar lifetimes: Reconciling the optical and X-ray quasar luminosity functions. Arxiv.

Chicago Style (17th ed.) Citation

Hopkins, Philip F., and Volker Springel. "Luminosity-dependent Quasar Lifetimes: Reconciling the Optical and X-ray Quasar Luminosity Functions." Arxiv 2005.

MLA (9th ed.) Citation

Hopkins, Philip F., and Volker Springel. "Luminosity-dependent Quasar Lifetimes: Reconciling the Optical and X-ray Quasar Luminosity Functions." Arxiv, 2005.