APA (7th ed.) Citation

Leibundgut,Christian, Maloszewski, P., & Külls, C. Tracers in Hydrology.

Chicago Style (17th ed.) Citation

Leibundgut,Christian, Piotr Maloszewski, and Christoph Külls. Tracers in Hydrology.

MLA (8th ed.) Citation

Leibundgut,Christian, et al. Tracers in Hydrology.