Gaya APA
IB Study Guide Biology. (2009).
Hongkong:
NTK Publishing.
Gaya Chicago
IB Study Guide Biology.
1.
Hongkong:
NTK Publishing,
2009.
Buku.
Gaya MLA
IB Study Guide Biology.
1.
Hongkong:
NTK Publishing,
2009.
Buku.
Gaya Turabian
IB Study Guide Biology.
Hongkong:
NTK Publishing,
2009.
Buku.