Papa, A. V. (1999). Pro-gun group hits Ping plan. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Papa, Alcuin V. "Pro-gun Group Hits Ping Plan." Philippine Daily Inquirer 1999.
Lua MLA (9ú heag.)Papa, Alcuin V. "Pro-gun Group Hits Ping Plan." Philippine Daily Inquirer, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.