APA引文

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引文

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

警告：這些引文格式不一定是100％准確.