APA
Dirac P. A. M., . (1947). The principles of quantum mechanics. Oxford: Clarendon Press.
Chicago
Dirac P A M, . 1947. The principles of quantum mechanics. Oxford: Clarendon Press.
Harvard
Dirac P. A. M., . (1947). The principles of quantum mechanics. Oxford: Clarendon Press.
MLA
Dirac P A M, . The principles of quantum mechanics. Oxford: Clarendon Press. 1947.