Gaya APA
ASME, . (1991).
1991 Annual book of ASTM standard volume 05.05. Gaseous fuels ; coal and coke (1991).
:
Philadelphia : ASTM,.
Gaya MLA
ASME, .
"1991 Annual book of ASTM standard volume 05.05. Gaseous fuels ; coal and coke".
1991
:
Philadelphia : ASTM,,
1991.
Text.