APA (7th ed.) Citation

Gribbin, J. (1998). In search of the edge of time. Penguin Books.

Chicago Style (17th ed.) Citation

Gribbin, John. In Search of the Edge of Time. London ; New York: Penguin Books, 1998.

MLA (9th ed.) Citation

Gribbin, John. In Search of the Edge of Time. Penguin Books, 1998.