APA (7th ed.) Citation

Titchmarsh, E. C. (1958). Eigenfunction expansions associated with second-order differential equations. Clarendon Press.

Chicago Style (17th ed.) Citation

Titchmarsh, Edward Charles. Eigenfunction Expansions Associated with Second-order Differential Equations. Oxford: Clarendon Press, 1958.

MLA (9th ed.) Citation

Titchmarsh, Edward Charles. Eigenfunction Expansions Associated with Second-order Differential Equations. Clarendon Press, 1958.