Gaya APA
Environment And Change : The Next Fifty Years. (1968).
London:
[s.n.].
Gaya Chicago
Environment And Change : The Next Fifty Years.
.
London:
[s.n.],
1968.
Text.
Gaya MLA
Environment And Change : The Next Fifty Years.
.
London:
[s.n.],
1968.
Text.
Gaya Turabian
Environment And Change : The Next Fifty Years.
London:
[s.n.],
1968.
Print.