APA (7th ed.) Citation

Cowley, C. R., Hubrig, S., & Castelli, F. Isotopic anomalies in CP stars: Helium, mercury, platinum, and calcium.

Chicago Style (17th ed.) Citation

Cowley, C. R., S. Hubrig, and F. Castelli. Isotopic Anomalies in CP Stars: Helium, Mercury, Platinum, and Calcium.

MLA (9th ed.) Citation

Cowley, C. R., et al. Isotopic Anomalies in CP Stars: Helium, Mercury, Platinum, and Calcium.

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