APA (7th ed.) Citation

Qian, S., & Quirrenbach, A. (1991). On the trajectories of the superluminal knots in 3C345. High energy astrophysics.

Chicago Style (17th ed.) Citation

Qian, Shan-Jie, and Andreas Quirrenbach. "On the Trajectories of the Superluminal Knots in 3C345." High Energy Astrophysics 1991.

MLA (9th ed.) Citation

Qian, Shan-Jie, and Andreas Quirrenbach. "On the Trajectories of the Superluminal Knots in 3C345." High Energy Astrophysics, 1991.

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