World Health Organization. (1959). Certificats de vaccination exigés dans les voyages internationaux =: Vaccination certificate requirements for international travel. Organisation mondiale de la santé.
Citazione stile Chigago Style (17a edizione)World Health Organization. Certificats De Vaccination Exigés Dans Les Voyages Internationaux =: Vaccination Certificate Requirements for International Travel. Genève: Organisation mondiale de la santé, 1959.
Citatione MLA (8a ed.)World Health Organization. Certificats De Vaccination Exigés Dans Les Voyages Internationaux =: Vaccination Certificate Requirements for International Travel. Organisation mondiale de la santé, 1959.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.