APA (7th ed.) Citation

Quirrenbach, A. (1992). Variability and VLBI observations of extragalactic radio sources. Variabilities in stars and galaxies.

Chicago Style (17th ed.) Citation

Quirrenbach, Andreas. "Variability and VLBI Observations of Extragalactic Radio Sources." Variabilities in Stars and Galaxies 1992.

MLA (9th ed.) Citation

Quirrenbach, Andreas. "Variability and VLBI Observations of Extragalactic Radio Sources." Variabilities in Stars and Galaxies, 1992.

Warning: These citations may not always be 100% accurate.