Gaya APA

ASTM., . (1978). 1978 annual book of ASTM standard part 26. Gaseous fuels; coal and coke; atmospheric analysis. (1978). : Philadelphia : ASTM.,.

Gaya MLA

ASTM., . "1978 annual book of ASTM standard part 26. Gaseous fuels; coal and coke; atmospheric analysis.". 1978 : Philadelphia : ASTM.,, 1978. Text.