APA (7th ed.) Citation

Nilsson, K., & Heidt, J. (2003). Host galaxies of RGB BL lacertae objects. High energy blazar astronomy.

Chicago Style (17th ed.) Citation

Nilsson, Kurt, and Jochen Heidt. "Host Galaxies of RGB BL Lacertae Objects." High Energy Blazar Astronomy 2003.

MLA (9th ed.) Citation

Nilsson, Kurt, and Jochen Heidt. "Host Galaxies of RGB BL Lacertae Objects." High Energy Blazar Astronomy, 2003.

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