APA (7th ed.) Citation

Otero-Espinar, M. V., Nieto, J. J., O’Regan, D., & Perera, K. Variational Methods and Critical Point Theory 2013. Wiley.

Chicago Style (17th ed.) Citation

Otero-Espinar, M. Victoria, Juan J. Nieto, Donal O’Regan, and Kanishka Perera. Variational Methods and Critical Point Theory 2013. Wiley.

MLA (9th ed.) Citation

Otero-Espinar, M. Victoria, et al. Variational Methods and Critical Point Theory 2013. Wiley.