ASTM designation D820-93 : Standard test methods for chemical analysis of soaps containing synthetic detergents.

MLA

Astm Designation D820-93 : Standard Test Methods for Chemical Analysis of Soaps Containing Synthetic Detergents. West Conshohocken (Pa.): ASTM International, n.d.

APA

(n.d). ASTM designation D820-93 : Standard test methods for chemical analysis of soaps containing synthetic detergents. West Conshohocken (Pa.): ASTM International.

Chicago

ASTM Designation D820-93: Standard Test Methods for Chemical Analysis of Soaps Containing Synthetic Detergents. West Conshohocken (Pa.): ASTM International, n.d.