Cita APA

Worldwatch Institute., Worldwatch Institute., & SpringerLink (Online service). (2015). State of the World 2015 (1st ed. 2015.). Washington, DC: Island Press/Center for Resource Economics : Imprint: Island Press.

Citación estilo Chicago

Worldwatch Institute., Worldwatch Institute, y SpringerLink (Online service). State of the World 2015. 1st ed. 2015. Washington, DC: Island Press/Center for Resource Economics : Imprint: Island Press, 2015.

Cita MLA

Worldwatch Institute., Worldwatch Institute, y SpringerLink (Online service). State of the World 2015. 1st ed. 2015. Washington, DC: Island Press/Center for Resource Economics : Imprint: Island Press, 2015.