Gaya APA
Stwertka, A.
(2002).
A guide to the elements
(
2 nd Ed.)
.
New York:
PT.ELEX MEDIA KOMPUTINDO.
Gaya MLA
Stwertka, Albert.
"A guide to the elements".
2 nd Ed.
New York:
PT.ELEX MEDIA KOMPUTINDO,
2002.
Text.