Gaya APA
Understanding Viruses. (2011).
New Delhi:
Discovery.
Gaya Chicago
Understanding Viruses.
1.
New Delhi:
Discovery,
2011.
Buku.
Gaya MLA
Understanding Viruses.
1.
New Delhi:
Discovery,
2011.
Buku.
Gaya Turabian
Understanding Viruses.
New Delhi:
Discovery,
2011.
Buku.