APA (7th ed.) Citation

Alonso-Sáez, L., Estrada, M., & Pedrós-Alió, C. (2012). Role for urea in nitrification by polar marine Archaea. Proceedings of the National Academy of Sciences, 109(44), 17989.

Chicago Style (17th ed.) Citation

Alonso-Sáez, Laura, Marta Estrada, and Carlos Pedrós-Alió. "Role for Urea in Nitrification by Polar Marine Archaea." Proceedings of the National Academy of Sciences 109, no. 44 (2012): 17989.

MLA (9th ed.) Citation

Alonso-Sáez, Laura, et al. "Role for Urea in Nitrification by Polar Marine Archaea." Proceedings of the National Academy of Sciences, vol. 109, no. 44, 2012, p. 17989.

Warning: These citations may not always be 100% accurate.