Gaya APA
Human ecology : a theoretical essay. (1986).
Chicago:
[s.n.].
Gaya Chicago
Human ecology : a theoretical essay.
Cet.1.
Chicago:
[s.n.],
1986.
Text.
Gaya MLA
Human ecology : a theoretical essay.
Cet.1.
Chicago:
[s.n.],
1986.
Text.
Gaya Turabian
Human ecology : a theoretical essay.
Chicago:
[s.n.],
1986.
Print.