Gaya APA
Biology: Life on earth. (2008).
Singapore:
Pearson Education.
Gaya Chicago
Biology: Life on earth.
8.
Singapore:
Pearson Education,
2008.
Buku.
Gaya MLA
Biology: Life on earth.
8.
Singapore:
Pearson Education,
2008.
Buku.
Gaya Turabian
Biology: Life on earth.
Singapore:
Pearson Education,
2008.
Buku.