APA Style

Society, N, G. (2009). National Geographic: Solar Power (September 2009 Vol. 216 No. 3). Washington, D.C., United State: National Geographic Society.

MLA Style

Society, National, Geographic. "National Geographic: Solar Power". September 2009 Vol. 216 No. 3 Washington, D.C., United State: National Geographic Society, 2009. Text.