Gaya APA
Othmer, K. (1964).
Encyclopaedias of Chemical Technology 2nd ed. Vol.5 .
United States of America:
John Wiley and Sons.
Gaya MLA
Othmer, Kirk-.
"Encyclopaedias of Chemical Technology 2nd ed. Vol.5".
United States of America:
John Wiley and Sons,
1964.
Text.