Cita APA (7th ed.)
Sheehan, M. O., Starke, L., Tibaijuka, A. K., Lerner, J., & Flavin, C. State of the World 2007: A Worldwatch Institute Report on Progress Toward a Sustainable Society : Our Urban Future. Norton ; Worldwatch Institute.
Cita Chicago (17th ed.)
Sheehan, Molly O'Meara, Linda Starke, Anna Kajumulo Tibaijuka, Jaime Lerner, i Christopher Flavin. State of the World 2007: A Worldwatch Institute Report on Progress Toward a Sustainable Society : Our Urban Future. Nueva York, EUA : Washington, EUA: Norton ; Worldwatch Institute.
Cita MLA (9th ed.)
Sheehan, Molly O'Meara, et al. State of the World 2007: A Worldwatch Institute Report on Progress Toward a Sustainable Society : Our Urban Future. Norton ; Worldwatch Institute.
Atenció: Aquestes cites poden no estar 100% correctes.