APA (7th ed.) Citation

De Lange, O. L., & Raab, R. E. (1991). Operator methods in quantum mechanics. Clarendon Press.

Chicago Style (17th ed.) Citation

De Lange, O. L., and R. E. Raab. Operator Methods in Quantum Mechanics. Oxford: Clarendon Press, 1991.

MLA (8th ed.) Citation

De Lange, O. L., and R. E. Raab. Operator Methods in Quantum Mechanics. Clarendon Press, 1991.