APA (7th ed.) Citation

Zhou, X., & Soria, R. (2012). Black hole masses from X-rays.

Chicago Style (17th ed.) Citation

Zhou, X., and Roberto Soria. Black Hole Masses from X-rays. 2012.

MLA (9th ed.) Citation

Zhou, X., and Roberto Soria. Black Hole Masses from X-rays. 2012.

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