APA (7th ed.) Citation

Ifrim, C., Stinnesbeck, W., & Schafhauser, A. Maastrichtian shallow-water ammonites of northeastern Mexico. Universidad Nacional Autónoma de México.

Chicago Style (17th ed.) Citation

Ifrim, Christina, Wolfgang Stinnesbeck, and Armin Schafhauser. Maastrichtian Shallow-water Ammonites of Northeastern Mexico. Universidad Nacional Autónoma de México.

MLA (9th ed.) Citation

Ifrim, Christina, et al. Maastrichtian Shallow-water Ammonites of Northeastern Mexico. Universidad Nacional Autónoma de México.