Gaya APA
ASTM, . (1997).
ASTM E 891 - 87 Standard Tables for Terrestrial Direct Normal Solar Spectral Irradiance for Air Mass 1.5 .
:
s.n..
Gaya MLA
ASTM, .
"ASTM E 891 - 87 Standard Tables for Terrestrial Direct Normal Solar Spectral Irradiance for Air Mass 1.5".
:
s.n.,
1997.
Diorama.