Gaya APA

ASTM., . (1978). 1978 annual book of ASTM standard part 16. Chemical resistant nonmetallic materials; vitrified clay and concrete pipe and tile; Masonry mortars and units; asbestos cement products. (1978). : Philadelphia : ASTM.,.

Gaya MLA

ASTM., . "1978 annual book of ASTM standard part 16. Chemical resistant nonmetallic materials; vitrified clay and concrete pipe and tile; Masonry mortars and units; asbestos cement products.". 1978 : Philadelphia : ASTM.,, 1978. Text.