APA (7th ed.) Zitazioa

(2014). Vital signs: The trends that are shaping our future. Worldwatch Institute ; Michael Renner, project director ; Linda Starke, editor ; Lyle Rosbotham, designer. Volume 21.

Chicago Style (17th ed.) Zitazioa

Vital Signs: The Trends That Are Shaping Our Future. Worldwatch Institute ; Michael Renner, Project Director ; Linda Starke, Editor ; Lyle Rosbotham, Designer. Volume 21. 2014.

MLA (9th ed.) Zitazioa

Vital Signs: The Trends That Are Shaping Our Future. Worldwatch Institute ; Michael Renner, Project Director ; Linda Starke, Editor ; Lyle Rosbotham, Designer. Volume 21. 2014.