APA (7th ed.) Citation

Hawking lhStephen W & Penrose. The Nature of space and time.

Chicago Style (17th ed.) Citation

Hawking lhStephen W and Penrose. The Nature of Space and Time. New Jersey lbPrinceton University Press lc2000.

MLA (9th ed.) Citation

Hawking lhStephen W and Penrose. The Nature of Space and Time.

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