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