APA (7th ed.) Citation

Jordan, S., Heber, U., & Weidemann, V. (1991). White dwarfs in the Hamburg Schmidt survey. White dwarfs.

Chicago Style (17th ed.) Citation

Jordan, Stefan, Ulrich Heber, and Volker Weidemann. "White Dwarfs in the Hamburg Schmidt Survey." White Dwarfs 1991.

MLA (9th ed.) Citation

Jordan, Stefan, et al. "White Dwarfs in the Hamburg Schmidt Survey." White Dwarfs, 1991.