APA (7th ed.) Citation

Martin, W. C., Zalubas, R., & Hagan, L. (1978). Atomic energy levels: The rare-earth elements.

Chicago Style (17th ed.) Citation

Martin, W. C., Romuald Zalubas, and Lucy Hagan. Atomic Energy Levels: The Rare-earth Elements. 1978.

MLA (9th ed.) Citation

Martin, W. C., et al. Atomic Energy Levels: The Rare-earth Elements. 1978.