APA (7th ed.) Zitazioa

Helrich, K. (1984). Official methods of analysis of the Association of Official Analytical Chemists (14a. ed.). Association of Official Analytical Chemists.

Chicago Style (17th ed.) Zitazioa

Helrich, Kenneth. Official Methods of Analysis of the Association of Official Analytical Chemists. 14a. ed. Arlington: Association of Official Analytical Chemists, 1984.

MLA (9th ed.) Zitazioa

Helrich, Kenneth. Official Methods of Analysis of the Association of Official Analytical Chemists. 14a. ed. Association of Official Analytical Chemists, 1984.