एपीए उद्धरण

Fridman, A., & Khoperskov, A. (2014). Physics of galaxies: Observations and investigation of galactic disks. Viva Books.

शिकागो स्टाइल उद्धरण

Fridman, A.M, और A.V Khoperskov. Physics of Galaxies: Observations and Investigation of Galactic Disks. New Delhi: Viva Books, 2014.

एमएलए उद्धरण

Fridman, A.M, और A.V Khoperskov. Physics of Galaxies: Observations and Investigation of Galactic Disks. Viva Books, 2014.