Gaya APA
Fundamentals of ecology. (1971).
Philadelphia:
Sounders College.
Gaya Chicago
Fundamentals of ecology.
3.
Philadelphia:
Sounders College,
1971.
Buku.
Gaya MLA
Fundamentals of ecology.
3.
Philadelphia:
Sounders College,
1971.
Buku.
Gaya Turabian
Fundamentals of ecology.
Philadelphia:
Sounders College,
1971.
Buku.