↑ John Kingsley Pangan, Church of the Far East (Makati: St. Pauls, 2016), 68. Sách này viết: In the nearby satellite island of Opong, Datu Mangal ruled the Sibuanons there and later his son succeeded him, rising in power and popularity. This legendary successor to Mangal was Lapu-lapu. There had been many versions, even myths surrounding Lapu-lapu's origin.
↑ Celestino C. Macachor (2011). "Searching for Kali in the Indigenous Chronicles of Jovito Abellana" . Rapid Journal . 10 (2).
↑ Donald F. Lach (1994). Asia in the Making of Europe, Volume I: The Century of Discovery. University ò Chicago. pp. 175, 635-638. ISBN 9780226467320.
↑ "The Death of Magellan, 1521". Eyewitnesstohistory.com.
↑ JP Sanger (1905). "History of the Population". Census of the Philippine Islands, Volume I: Geography, History, and Population. Washington, DC: Hoa Kỳ Cục Điều tra dân số. p. 414. ISBN 9789712321429.
↑ Paul A. Rodell (2002). Culture and Customs of the Philippines. Greenwood Publishing Group. p. 50. ISBN 9780313304156.
↑ William G. Clarence-Smith (2012). Sexual Diversity in Asia, c. Routledge. p. 130. ISBN 9781136297212.