APA (7th ed.) Citation

Berestycki, H., Coron, J., & Ekeland, I. (1990). Variational methods: Proceedings of a conference Paris, June 1988. Birkhaeuser.

Chicago Style (17th ed.) Citation

Berestycki, H., Jean-Michel Coron, and I. Ekeland. Variational Methods: Proceedings of a Conference Paris, June 1988. Boston: Birkhaeuser, 1990.

MLA (8th ed.) Citation

Berestycki, H., et al. Variational Methods: Proceedings of a Conference Paris, June 1988. Birkhaeuser, 1990.