Gaya APA
Biological science. (1980).
New York:
W.W.norton&company.
Gaya Chicago
Biological science.
.
New York:
W.W.norton&company,
1980.
Buku.
Gaya MLA
Biological science.
.
New York:
W.W.norton&company,
1980.
Buku.
Gaya Turabian
Biological science.
New York:
W.W.norton&company,
1980.
Buku.