Cita APA

Filkin, D. (1997). Stephen Hawking's universe: The cosmos explained. New York: Basic Books.

Citación estilo Chicago

Filkin, David. Stephen Hawking's Universe: The Cosmos Explained. New York: Basic Books, 1997.

Cita MLA

Filkin, David. Stephen Hawking's Universe: The Cosmos Explained. New York: Basic Books, 1997.

Precaución: Estas citas no son 100% exactas.