World Health Organization. (2011). Psychological first aid: Guide for field workers. World Health Organization.
Style de citation Chicago (17e éd.)World Health Organization. Psychological First Aid: Guide for Field Workers. Geneva, Switzerland: World Health Organization, 2011.
Style de citation MLA (8e éd.)World Health Organization. Psychological First Aid: Guide for Field Workers. World Health Organization, 2011.
Attention : ces citations peuvent ne pas être correctes à 100%.