APA (7th ed.) Citation

Pagels, H. R. (1992). Perfect symmetry : the search for the beginning of time / Heinz R. Pagels: The search for the beginning of time. Penguin.

Chicago Style (17th ed.) Citation

Pagels, Heinz R. Perfect Symmetry : The Search for the Beginning of Time / Heinz R. Pagels: The Search for the Beginning of Time. London: Penguin, 1992.

MLA (9th ed.) Citation

Pagels, Heinz R. Perfect Symmetry : The Search for the Beginning of Time / Heinz R. Pagels: The Search for the Beginning of Time. Penguin, 1992.

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