Oropilla, Q. F. (2001). Philippine counterstamped coins, 1828-1839: With original archival documents. Noumisma-Economic History Research Pub.
Citace podle Chicago (17th ed.)Oropilla, Quintin Fortich. Philippine Counterstamped Coins, 1828-1839: With Original Archival Documents. Quezon City: Noumisma-Economic History Research Pub, 2001.
Citace podle MLA (9th ed.)Oropilla, Quintin Fortich. Philippine Counterstamped Coins, 1828-1839: With Original Archival Documents. Noumisma-Economic History Research Pub, 2001.
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