APA (7th ed.) Citation

Mújica, R., Appenzeller, I., & Krautter, J. (1999). BL lac objects in a complete sample of northern ROSAT all-sky survey sources. Highlights in x-ray astronomy.

Chicago Style (17th ed.) Citation

Mújica, Raul, Immo Appenzeller, and Joachim Krautter. "BL Lac Objects in a Complete Sample of Northern ROSAT All-sky Survey Sources." Highlights in X-ray Astronomy 1999.

MLA (9th ed.) Citation

Mújica, Raul, et al. "BL Lac Objects in a Complete Sample of Northern ROSAT All-sky Survey Sources." Highlights in X-ray Astronomy, 1999.