Παραπομπή σε μορφή APA (7η εκδ.)

Helrich, K. (1990). Official methods of analysis of the Association of Official Analytical Chemists (15th edition.). Association of Official Analytical Chemists.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Helrich, Kenneth. Official Methods of Analysis of the Association of Official Analytical Chemists. 15th edition. Arlington, VI: Association of Official Analytical Chemists, 1990.

Παραπομπή σε μορφή MLA (8th εκδ.)

Helrich, Kenneth. Official Methods of Analysis of the Association of Official Analytical Chemists. 15th edition. Association of Official Analytical Chemists, 1990.