Cita APA

(2004). Signposts 2004: Essential data, timelines, and analyses of global trends. Worldwatch Institute.

Chicago Style Citation

Signposts 2004: Essential Data, Timelines, and Analyses of Global Trends. Worldwatch Institute, 2004.

Cita MLA

Signposts 2004: Essential Data, Timelines, and Analyses of Global Trends. Worldwatch Institute, 2004.

Atenció: Aquestes cites poden no estar 100% correctes.