APA (7th ed.) Citation

Köthe, G. (1966). Contributions to functional analysis. Springer-Verlag.

Chicago Style (17th ed.) Citation

Köthe, Gottfried. Contributions to Functional Analysis. Berlin, New York: Springer-Verlag, 1966.

MLA (9th ed.) Citation

Köthe, Gottfried. Contributions to Functional Analysis. Springer-Verlag, 1966.