Gaya APA
Othmer, K. (1965).
Encyclopaedias of Chemical Technology 2nd Edition Volume 6 .
United States of America:
John Wiley and Sons.
Gaya MLA
Othmer, Kirk-.
"Encyclopaedias of Chemical Technology 2nd Edition Volume 6".
United States of America:
John Wiley and Sons,
1965.
Text.