APA (7th ed.) Citation

Ifrim, C., Stinnesbeck, W., & Schafhauser, A. (2018, May). Maastrichtian shallow-water ammonites of northeastern Mexico. Revista Mexicana de Ciencias Geológicas.

Chicago Style (17th ed.) Citation

Ifrim, Christina, Wolfgang Stinnesbeck, and Armin Schafhauser. "Maastrichtian Shallow-water Ammonites of Northeastern Mexico." Revista Mexicana De Ciencias Geológicas May. 2018.

MLA (9th ed.) Citation

Ifrim, Christina, et al. "Maastrichtian Shallow-water Ammonites of Northeastern Mexico." Revista Mexicana De Ciencias Geológicas, May. 2018.