Garcellano, R. A. (2000). In memoriam. IN Commentary [column]: Petronilo Bn. Daroy. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Garcellano, Rosario A. "In Memoriam. IN Commentary [column]: Petronilo Bn. Daroy." Philippine Daily Inquirer 2000.
Lua MLA (9ú heag.)Garcellano, Rosario A. "In Memoriam. IN Commentary [column]: Petronilo Bn. Daroy." Philippine Daily Inquirer, 2000.
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