«The Henley Passport Index». Henley & Partners Holdings Ltd. 8 de enero de 2019. Archivado desde el original el 31 de marzo de 2022. Consultado el 8 de enero de 2019. «This graph shows the full Global Ranking of the 2019 Henley Passport Index. As the index uses dense ranking, in certain cases, a rank is shared by multiple countries because these countries all have the same level of visa-free or visa-on-arrival access.»
«The Henley Passport Index». Henley & Partners Holdings Ltd. 8 de enero de 2019. Archivado desde el original el 31 de marzo de 2022. Consultado el 8 de enero de 2019. «This graph shows the full Global Ranking of the 2019 Henley Passport Index. As the index uses dense ranking, in certain cases, a rank is shared by multiple countries because these countries all have the same level of visa-free or visa-on-arrival access.»