Cita APA (7a ed.)

Wheeler, J. A. (1999). A Journey into gravity and spacetime. Scientific American Library ; W.H. Freemann and Company [distribuïdor].

Cita Chicago Style (17a ed.)

Wheeler, John Archibald. A Journey into Gravity and Spacetime. New York : New York [etc.]: Scientific American Library ; W.H. Freemann and Company [distribuïdor], 1999.

Cita MLA (9a ed.)

Wheeler, John Archibald. A Journey into Gravity and Spacetime. Scientific American Library ; W.H. Freemann and Company [distribuïdor], 1999.