Alfonso, I. C. (2015). Revisiting the sources of the founding of an early Spanish town: The case of Calumpit, Bulacan. Journal of Philippine local history and heritage.
Citazione stile Chigago Style (17a edizione)Alfonso, Ian Christopher. "Revisiting the Sources of the Founding of an Early Spanish Town: The Case of Calumpit, Bulacan." Journal of Philippine Local History and Heritage 2015.
Citatione MLA (9a ed.)Alfonso, Ian Christopher. "Revisiting the Sources of the Founding of an Early Spanish Town: The Case of Calumpit, Bulacan." Journal of Philippine Local History and Heritage, 2015.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.