APA (7th ed.) Citation

Halmos, P. R. (1957). An introduction to Hilbert space and the theory of spectral multiplicity. Chelsea Publishing Company.

Chicago Style (17th ed.) Citation

Halmos, Paul R. An Introduction to Hilbert Space and the Theory of Spectral Multiplicity. New York: Chelsea Publishing Company, 1957.

MLA (8th ed.) Citation

Halmos, Paul R. An Introduction to Hilbert Space and the Theory of Spectral Multiplicity. Chelsea Publishing Company, 1957.

Warning: These citations may not always be 100% accurate.