APA (7th ed.) Citation

Postma, A. (1992). The Laguna Copper-Plate Inscription (LCI): A valuable Philippine document. Philippine Studies.

Chicago Style (17th ed.) Citation

Postma, Antoon. "The Laguna Copper-Plate Inscription (LCI): A Valuable Philippine Document." Philippine Studies 1992.

MLA (9th ed.) Citation

Postma, Antoon. "The Laguna Copper-Plate Inscription (LCI): A Valuable Philippine Document." Philippine Studies, 1992.

Warning: These citations may not always be 100% accurate.