Lua APA (7ú heag.)

Ocampo, A. R. (1999). Angano petroglyphs. IN Looking back [column]. Philippine Daily Inquirer.

Lua i Stíl Chicago (17ú heag.)

Ocampo, Ambeth R. "Angano Petroglyphs. IN Looking Back [column]." Philippine Daily Inquirer 1999.

Lua MLA (9ú heag.)

Ocampo, Ambeth R. "Angano Petroglyphs. IN Looking Back [column]." Philippine Daily Inquirer, 1999.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.