APA (7th ed.) Citation

Gaiam Americas, Inc, & Hawking, S. (2011). Into the universe with Stephen Hawking. Gaiam.

Chicago Style (17th ed.) Citation

Gaiam Americas, Inc, and Stephen Hawking. Into the Universe with Stephen Hawking. [Boulder, Colo.]: Gaiam, 2011.

MLA (8th ed.) Citation

Gaiam Americas, Inc, and Stephen Hawking. Into the Universe with Stephen Hawking. Gaiam, 2011.

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