Cita APA (7a ed.)

Gigliotti, J., & Copeland, G. (2019). Who was Stephen Hawking? Penguin Workshop, an imprint of Penguin Random House.

Cita Chicago Style (17a ed.)

Gigliotti, Jim, y Gregory Copeland. Who Was Stephen Hawking? New York, New York: Penguin Workshop, an imprint of Penguin Random House, 2019.

Cita MLA (8a ed.)

Gigliotti, Jim, y Gregory Copeland. Who Was Stephen Hawking? Penguin Workshop, an imprint of Penguin Random House, 2019.

Precaución: Estas citas no son 100% exactas.