APA (7th ed.) Citation

Jordan, S., Bastian, U., Lenhardt, H., & Biermann, M. (2004). Gaia first look. Arxiv.

Chicago Style (17th ed.) Citation

Jordan, Stefan, Ulrich Bastian, Helmut Lenhardt, and Michael Biermann. "Gaia First Look." Arxiv 2004.

MLA (9th ed.) Citation

Jordan, Stefan, et al. "Gaia First Look." Arxiv, 2004.