1. Ad Apostolorum Principis. 1958. http://w2.vatican.va/content/pius-xii/en/encyclicals/documents/hf_p-xii_enc_29061958_ad-apostolorum-principis.html. Accessed 10 April 2019.
2. Address of John Paul II to the Bishops of China on Their ‘Ad Limina’ Visit. 1980. https://w2.vatican.va/content/john-paul-ii/en/speeches/1980/november/documents/hf_jp_ii_spe_19801111_vescovi-cina.html. Accessed 10 April 2019.
3. Address of Pope John Paul II to The Bishops of The Chinese Episcopal Conference on Their ‘Ad Limina’ Visit. 1985. https://www.vatican.va/content/john-paul-ii/en/speeches/1985/november/documents/hf_jp-ii_spe_19851108_cina-ad-limina.pdf. Accessed 14 February 2022.
4. Apostolic Journey to Pakistan, Philippines I, Guam, Japan, Anchorage. 1981. https://w2.vatican.va/content/john-paul-ii/en/travels/1981/travels/documents/trav_far-east.html. Accessed 10 April 2019.
5. Ad Sinarum Gentem. 1954. http://w2.vatican.va/content/pius-xii/it/encyclicals/documents/hf_p-xii_enc_07101954_ad-sinarum-gentem.html. Accessed 10 April 2019.