MLA

Unger,Richard W. Energy Transitions In History : Global Cases of Continuity and Change. München: RCC, 2013.

APA

Unger,Richard W, U. W. (2013). Energy Transitions in History : Global Cases of Continuity and Change. München: RCC.

Chicago

Unger,Richard W. Energy Transitions In History : Global Cases of Continuity and Change. München: RCC, 2013.