Cita APA (7a ed.)

World Health Organization. (2011). Psychological first aid: Guide for field workers. World Health Organization.

Cita Chicago Style (17a ed.)

World Health Organization. Psychological First Aid: Guide for Field Workers. Geneva, Switzerland: World Health Organization, 2011.

Cita MLA (8a ed.)

World Health Organization. Psychological First Aid: Guide for Field Workers. World Health Organization, 2011.