APA (7th ed.) Citation

Grebel, E. K., Roberts, W. J., & Brandner, W. (1996). On the nature of the blue giants in NGC 330. Astronomy & astrophysics, 311, .

Chicago Style (17th ed.) Citation

Grebel, Eva K., Wm. James Roberts, and Wolfgang Brandner. "On the Nature of the Blue Giants in NGC 330." Astronomy & Astrophysics 311 (1996).

MLA (9th ed.) Citation

Grebel, Eva K., et al. "On the Nature of the Blue Giants in NGC 330." Astronomy & Astrophysics, vol. 311, 1996.