APA (7th ed.) Citation

Friedman, A. (1982). Variational principles and free-boundary problems (1.print.). Wiley.

Chicago Style (17th ed.) Citation

Friedman, Avner. Variational Principles and Free-boundary Problems. 1.print. New York [u.a.]: Wiley, 1982.

MLA (9th ed.) Citation

Friedman, Avner. Variational Principles and Free-boundary Problems. 1.print. Wiley, 1982.