Wheeler, J. A. (1990). A journey into gravity and spacetime. Scientific American Library.
Cita Chicago Style (17a ed.)Wheeler, John Archibald. A Journey into Gravity and Spacetime. New York: Scientific American Library, 1990.
Cita MLA (9a ed.)Wheeler, John Archibald. A Journey into Gravity and Spacetime. Scientific American Library, 1990.
Precaución: Estas citas no son 100% exactas.