APA引文

(1967). Road map of the City of Davao. s.n.].

芝加哥风格引文

Road Map of the City of Davao. [S.l: s.n.], 1967.

MLA引文

Road Map of the City of Davao. s.n.], 1967.

警告：这些引文格式不一定是100％准确.