APA (7th ed.) Citation

Mellier, Y., Fort, B., & Soucail, G. (1990). Gravitational lensing: Proceedings of a workshop held in Toulouse, France, September 13-15, 1989. Springer-Verlag.

Chicago Style (17th ed.) Citation

Mellier, Y., B. Fort, and G. Soucail. Gravitational Lensing: Proceedings of a Workshop Held in Toulouse, France, September 13-15, 1989. Berlin ; New York: Springer-Verlag, 1990.

MLA (9th ed.) Citation

Mellier, Y., et al. Gravitational Lensing: Proceedings of a Workshop Held in Toulouse, France, September 13-15, 1989. Springer-Verlag, 1990.