APA引文

Pettiford, R., & Boughey, S. (2019). Gravity ([VOX edition].). [Library Ideas, LLC].

Chicago Style (17th ed.) Citation

Pettiford, Rebecca, and Simon Boughey. Gravity. [VOX edition]. [Fairfax, Virginia]: [Library Ideas, LLC], 2019.

MLA引文

Pettiford, Rebecca, and Simon Boughey. Gravity. [VOX edition]. [Library Ideas, LLC], 2019.

警告：這些引文格式不一定是100％准確.