Gaya APA

Quality control pupuk ammonium sulfat di PT. Petrokimia Gresik, Jawa Timur. (2011). : FMIPA UNS.

Gaya MLA

Quality control pupuk ammonium sulfat di PT. Petrokimia Gresik, Jawa Timur. . : FMIPA UNS, 2011. Text.