APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.