APA (7th ed.) Citation

Tattersall, O., & Ferreira, P. (2019). Testing gravity with black holes.

Chicago Style (17th ed.) Citation

Tattersall, O., and P. Ferreira. Testing Gravity with Black Holes. 2019.

MLA (9th ed.) Citation

Tattersall, O., and P. Ferreira. Testing Gravity with Black Holes. 2019.

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