Gaya APA
Nugroho, A. (2010).
The Essentials of Biology for grade VII of junior high school and islamic junior high school .
Surabaya:
Bilingual.
Gaya MLA
Nugroho, Arinto.
"The Essentials of Biology for grade VII of junior high school and islamic junior high school".
Surabaya:
Bilingual,
2010.
Text.