(2019). 世界博览．2019,no. 1,11,19,21.
Chicago Style aipamena世界博览．2019,no. 1,11,19,21. 2019.
MLA aipamena世界博览．2019,no. 1,11,19,21. 2019.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena
(2019). 世界博览．2019,no. 1,11,19,21.
Chicago Style aipamena世界博览．2019,no. 1,11,19,21. 2019.
MLA aipamena世界博览．2019,no. 1,11,19,21. 2019.