Citazione Stile APA (7a Edizione)

World Health organization. (2012). International travel and health. World Health Organization.

Citazione stile Chigago Style (17a edizione)

World Health organization. International Travel and Health. Geneva, Switzerland: World Health Organization, 2012.

Citatione MLA (8a ed.)

World Health organization. International Travel and Health. World Health Organization, 2012.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.