APA引文

Verhofstadt, G. (1991). Burgermanifest. [S.l.]: [s.n.].

芝加哥风格引文

Verhofstadt, Guy. Burgermanifest. [S.l.]: [s.n.], 1991.

MLA引文

Verhofstadt, Guy. Burgermanifest. [S.l.]: [s.n.], 1991.

警告：这些引文格式不一定是100％准确.