APA (7th ed.) Citation

Gradstein, F. M., Ogg, J. G., Schmitz, M. D., & Ogg, G. (2020). Geologic Time Scale 2020, Volume 1. Elsevier.

Chicago Style (17th ed.) Citation

Gradstein, Felix M., James G. Ogg, Mark D. Schmitz, and Gabi Ogg. Geologic Time Scale 2020, Volume 1. Amsterdam ; Oxford ; Cambridge: Elsevier, 2020.

MLA (9th ed.) Citation

Gradstein, Felix M., et al. Geologic Time Scale 2020, Volume 1. Elsevier, 2020.