Cita APA

Pagels, H. R. (1985). Perfect symmetry: The search for the beginning of time.

Chicago Edition Citation

Pagels, Heinz R. Perfect Symmetry: The Search for the Beginning of Time. Michael Joseph, London, 1985.

Cita MLA

Pagels, Heinz R. Perfect Symmetry: The Search for the Beginning of Time. 1985.