APA引文

(1987). Parasites of sheep. New Jersey: Merck co.

Trích dẫn kiểu Chicago

Parasites of Sheep. New Jersey: Merck co, 1987.

MLA引文

Parasites of Sheep. New Jersey: Merck co, 1987.

警告：这些引文格式不一定是100％准确.