Gaya APA
Biological Systems. (1969).
Philadelphia:
W.B Saunders Company.
Gaya Chicago
Biological Systems.
.
Philadelphia:
W.B Saunders Company,
1969.
Buku.
Gaya MLA
Biological Systems.
.
Philadelphia:
W.B Saunders Company,
1969.
Buku.
Gaya Turabian
Biological Systems.
Philadelphia:
W.B Saunders Company,
1969.
Buku.