APA (7th ed.) Citation

Harbeck, D., Smith, G. H., & Grebel, E. K. (2003). CN Variations in NGC 7006. Astronomy and astrophysics, 409(2), . https://doi.org/10.1051/0004-6361:20031174

Chicago Style (17th ed.) Citation

Harbeck, Daniel-Rolf, Graeme H. Smith, and Eva K. Grebel. "CN Variations in NGC 7006." Astronomy and Astrophysics 409, no. 2 (2003). https://doi.org/10.1051/0004-6361:20031174.

MLA (9th ed.) Citation

Harbeck, Daniel-Rolf, et al. "CN Variations in NGC 7006." Astronomy and Astrophysics, vol. 409, no. 2, 2003, https://doi.org/10.1051/0004-6361:20031174.