APA (7th ed.) Citation

Cohen, D. S. (1964). Eigenfunction expansions and non selfadjoint boundary value problems. John Wiley & Sons.

Chicago Style (17th ed.) Citation

Cohen, Donald S. Eigenfunction Expansions and Non Selfadjoint Boundary Value Problems. [New York]: John Wiley & Sons, 1964.

MLA (9th ed.) Citation

Cohen, Donald S. Eigenfunction Expansions and Non Selfadjoint Boundary Value Problems. John Wiley & Sons, 1964.