APA (7th ed.) Citation

Feynman, R. P. (1985). QED: The strange theory of light and matter. Penguin Books.

Chicago Style (17th ed.) Citation

Feynman, Richard Phillips. QED: The Strange Theory of Light and Matter. London: Penguin Books, 1985.

MLA (9th ed.) Citation

Feynman, Richard Phillips. QED: The Strange Theory of Light and Matter. Penguin Books, 1985.

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