APA引文

(2009). Calcium and Magnesium in Drinking-Water. s.n.

芝加哥风格引文

Calcium and Magnesium in Drinking-Water. Washington, D.C: s.n, 2009.

MLA引文

Calcium and Magnesium in Drinking-Water. s.n, 2009.

警告：这些引文格式不一定是100％准确.