APA引文

Gavino, R. T. (1973). Social usage and protocol (4th ed.). s.n.].

芝加哥风格引文

Gavino, Roman T. Social Usage and Protocol. 4th ed. [Makati, Rizal: s.n.], 1973.

MLA引文

Gavino, Roman T. Social Usage and Protocol. 4th ed. s.n.], 1973.

警告：这些引文格式不一定是100％准确.