Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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