APA (7th ed.) Citation

Kreyszig, E. (1978). Introductory functional analysis with applications. Wiley.

Chicago Style (17th ed.) Citation

Kreyszig, Erwin. Introductory Functional Analysis with Applications. New York: Wiley, 1978.

MLA (8th ed.) Citation

Kreyszig, Erwin. Introductory Functional Analysis with Applications. Wiley, 1978.