APA引文

Helping your students communicate with confidence. [S.l.]: [s.n.].

Trích dẫn kiểu Chicago

Helping Your Students Communicate With Confidence. [S.l.]: [s.n.].

MLA引文

Helping Your Students Communicate With Confidence. [S.l.]: [s.n.].

警告：这些引文格式不一定是100％准确.