Gaya APA

ASTM, . (1997). ASTM D 450 - 96 ; ASTM D 450 - 96 (Reapproved 2000) Standard specification for coal tar pitch used in roofing, dampproofing, and waterproofing . : ASTM.

Gaya MLA

ASTM, . "ASTM D 450 - 96 ; ASTM D 450 - 96 (Reapproved 2000) Standard specification for coal tar pitch used in roofing, dampproofing, and waterproofing". : ASTM, 1997. Diorama.