Cita APA (7th ed.)

Kreyszig, E. (1989). Introductory Functional Analysis with Applications. John Wiley & Sons.

Cita Chicago (17th ed.)

Kreyszig, Erwin. Introductory Functional Analysis with Applications. New York: John Wiley & Sons, 1989.

Cita MLA (9th ed.)

Kreyszig, Erwin. Introductory Functional Analysis with Applications. John Wiley & Sons, 1989.