APA (7th ed.) Citation

Hawking S. (2020). A Brief History of Time. Phoenix Books.

Chicago Style (17th ed.) Citation

Hawking S. A Brief History of Time. New York: Phoenix Books, 2020.

MLA (8th ed.) Citation

Hawking S. A Brief History of Time. Phoenix Books, 2020.

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