APA (7th ed.) Citation

Friedman, A., & Spruck, J. (1993). Variational and Free Boundary Problems. Springer New York.

Chicago Style (17th ed.) Citation

Friedman, Avner, and Joel Spruck. Variational and Free Boundary Problems. New York, NY: Springer New York, 1993.

MLA (9th ed.) Citation

Friedman, Avner, and Joel Spruck. Variational and Free Boundary Problems. Springer New York, 1993.