Gaya APA
Sumarwan, . (2006).
Science for Junior High School Grade VII 1st semester .
Yogyakarta, Indonesia:
Penerbit Erlangga.
Gaya MLA
Sumarwan, .
"Science for Junior High School Grade VII 1st semester".
Yogyakarta, Indonesia:
Penerbit Erlangga,
2006.
Text.