APA način citiranja (7. izdanje)

Friedman, A. (2010). Variational principles and free-boundary problems (Dover ed.). Dover.

Čikaški stil citiranja (17. izdanje)

Friedman, Avner. Variational Principles and Free-boundary Problems. Dover ed. Mineola, N.Y: Dover, 2010.

MLA način citiranja (9. izdanje)

Friedman, Avner. Variational Principles and Free-boundary Problems. Dover ed. Dover, 2010.