Gaya APA
Kelestarian Alam. (1982).
Sebastopol, CA:
Pastel.
Gaya Chicago
Kelestarian Alam.
.
Sebastopol, CA:
Pastel,
1982.
Text.
Gaya MLA
Kelestarian Alam.
.
Sebastopol, CA:
Pastel,
1982.
Text.
Gaya Turabian
Kelestarian Alam.
Sebastopol, CA:
Pastel,
1982.
Print.