APA (7th ed.) Citation

Kheifets, A., Ivanov, I., & Bray, I. (2012). Atomic photoionization: When does it actually begin?

Chicago Style (17th ed.) Citation

Kheifets, A., I. Ivanov, and Igor Bray. Atomic Photoionization: When Does It Actually Begin? 2012.

MLA (9th ed.) Citation

Kheifets, A., et al. Atomic Photoionization: When Does It Actually Begin? 2012.