Gaya APA
Inc., M. (1971).
Encyclopedia of science and technology. Volume 7. Ice Iyt (1971).
:
New-York : McGraw-Hill Book. Co.,.
Gaya MLA
Inc., McGraw-Hill.
"Encyclopedia of science and technology. Volume 7. Ice Iyt".
1971
:
New-York : McGraw-Hill Book. Co.,,
1971.
Text.