APA (7th ed.) Citation

Smolin, L. (2006). The trouble with physics: The rise of string theory, the fall of a science, and what comes next. Penguin Books.

Chicago Style (17th ed.) Citation

Smolin, Lee. The Trouble with Physics: The Rise of String Theory, the Fall of a Science, and What Comes Next. London: Penguin Books, 2006.

MLA (8th ed.) Citation

Smolin, Lee. The Trouble with Physics: The Rise of String Theory, the Fall of a Science, and What Comes Next. Penguin Books, 2006.