Gaya APA

Horwitz, W. (1975). Official Methods of Analysis of The Association of Official Analytical Chemists (12th.ed). Washington: Association of Official Analytical Chemists.

Gaya MLA

Horwitz, William. "Official Methods of Analysis of The Association of Official Analytical Chemists". 12th.ed Washington: Association of Official Analytical Chemists, 1975. Text.