Basilia, P. A. (2014). Buttons of San Juan: Preliminary analysis of buttons recovered from San Juan, Batangas 2009 field season. Hukay.
Citace podle Chicago (17th ed.)Basilia, Pauline A. "Buttons of San Juan: Preliminary Analysis of Buttons Recovered from San Juan, Batangas 2009 Field Season." Hukay 2014.
Citace podle MLA (9th ed.)Basilia, Pauline A. "Buttons of San Juan: Preliminary Analysis of Buttons Recovered from San Juan, Batangas 2009 Field Season." Hukay, 2014.
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