APA
(1974). Energy primer, solar water, wind and biofuels. Menlo, Calif: Portola Institute.
Chicago
1974. Energy primer, solar water, wind and biofuels. Menlo, Calif: Portola Institute.
Harvard
(1974). Energy primer, solar water, wind and biofuels. Menlo, Calif: Portola Institute.
MLA
Energy primer, solar water, wind and biofuels. Menlo, Calif: Portola Institute. 1974.