APA (7th ed.) Citation

Dirac, P. A. M. (1981). The principles of quantum mechanics (4th ed., (rev.).). Clarendon Press.

Chicago Style (17th ed.) Citation

Dirac, P. A. M. The Principles of Quantum Mechanics. 4th ed., (rev.). Oxford [England]: Clarendon Press, 1981.

MLA (9th ed.) Citation

Dirac, P. A. M. The Principles of Quantum Mechanics. 4th ed., (rev.). Clarendon Press, 1981.