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.
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