Basilia, P. A. (2014). Buttons of San Juan: Preliminary analysis of buttons recovered from San Juan, Batangas 2009 field season. Hukay.
Citazione stile Chigago Style (17a edizione)Basilia, Pauline A. "Buttons of San Juan: Preliminary Analysis of Buttons Recovered from San Juan, Batangas 2009 Field Season." Hukay 2014.
Citatione MLA (9a ed.)Basilia, Pauline A. "Buttons of San Juan: Preliminary Analysis of Buttons Recovered from San Juan, Batangas 2009 Field Season." Hukay, 2014.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.