"Pre-colonial Manila". Malacañang Presidential Museum and Library. Malacañang Presidential Museum and Library Araw ng Maynila Briefers. Presidential Communications Development and Strategic Planning Office. 23 June 2015. Archived from the original on 9 March 2016. Retrieved 27 April 2017.
"Pre-colonial Manila". Malacañang Presidential Museum and Library. Malacañang Presidential Museum and Library Araw ng Maynila Briefers. Presidential Communications Development and Strategic Planning Office. 23 June 2015. Archived from the original on 9 March 2016. Retrieved 27 April 2017.