(2019). 集邮博览．2019,no.6-7.
Chicago Style (17th ed.) Citation集邮博览．2019,no.6-7. 2019.
MLA (8th ed.) Citation集邮博览．2019,no.6-7. 2019.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.
APA (7th ed.) Citation
(2019). 集邮博览．2019,no.6-7.
Chicago Style (17th ed.) Citation集邮博览．2019,no.6-7. 2019.
MLA (8th ed.) Citation集邮博览．2019,no.6-7. 2019.