APA (7th ed.) Citation

Krichbaum, T. P., Quirrenbach, A., & Witzel, A. (1992). Intraday variability of compact extragalactic radio sources. Variability of blazars.

Chicago Style (17th ed.) Citation

Krichbaum, Thomas P., Andreas Quirrenbach, and Arno Witzel. "Intraday Variability of Compact Extragalactic Radio Sources." Variability of Blazars 1992.

MLA (9th ed.) Citation

Krichbaum, Thomas P., et al. "Intraday Variability of Compact Extragalactic Radio Sources." Variability of Blazars, 1992.