APA引文

Berlin: Presentation of a city. [s.l.]: [s.n.].

Παραπομπή Chicago Style

Berlin: Presentation of a City. [s.l.]: [s.n.].

MLA引文

Berlin: Presentation of a City. [s.l.]: [s.n.].

警告：这些引文格式不一定是100％准确.