APA (7th ed.) Citation

D. J. Griffiths, e. a. Introduction to Quantum Mechanics.

Chicago Style (17th ed.) Citation

D. J. Griffiths, et al. Introduction to Quantum Mechanics.

MLA (8th ed.) Citation

D. J. Griffiths, et al. Introduction to Quantum Mechanics.

Warning: These citations may not always be 100% accurate.