Cita APA

Smith, N., & Smith, N. (1981). Wood: An ancient fuel with a new future. Washington: Worldwatch Institute.

Citación estilo Chicago

Smith, Nigel, y Nigel Smith. Wood: An Ancient Fuel With a New Future. Washington: Worldwatch Institute, 1981.

Cita MLA

Smith, Nigel, y Nigel Smith. Wood: An Ancient Fuel With a New Future. Washington: Worldwatch Institute, 1981.

Precaución: Estas citas no son 100% exactas.