(2020). 环 球．2020.
Chicago Style (17th ed.) Citation环 球．2020. 2020.
Cita MLA环 球．2020. 2020.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA
(2020). 环 球．2020.
Chicago Style (17th ed.) Citation环 球．2020. 2020.
Cita MLA环 球．2020. 2020.