Cita APA (7a ed.)
Smethurst, B. Space at the Speed of Light: The History of 14 Billion Years for People Short on Time. Penguin Random House.
Cita estilo Chicago (17a ed.)
Smethurst, Becky. Space at the Speed of Light: The History of 14 Billion Years for People Short on Time. Nueva York, EUA: Penguin Random House.
Cita MLA (9a ed.)
Smethurst, Becky. Space at the Speed of Light: The History of 14 Billion Years for People Short on Time. Penguin Random House.
Precaución: Estas citas no son 100% exactas.