Koo, G. S. (2000). The good, the bad and the urgly: Teachers' pets and pet peeves. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Koo, Grace S. "The Good, the Bad and the Urgly: Teachers' Pets and Pet Peeves." Philippine Daily Inquirer 2000.
Lua MLA (9ú heag.)Koo, Grace S. "The Good, the Bad and the Urgly: Teachers' Pets and Pet Peeves." Philippine Daily Inquirer, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.