Gaya APA
Gerrish, H, H., E.Dugger, W. (1983).
electricity .
United States of America:
The GoodHeart-Willcox Company.inc.
Gaya MLA
Gerrish, Howard, H.., E.Dugger, William.
"electricity".
United States of America:
The GoodHeart-Willcox Company.inc,
1983.
Text.