Gumpol, W. (2002). Mastery of Sixteen Tenses/ W.Y. Gumpol. Yogyakarta: Kanisius.
Lua i Stíl Chicago (17ú heag.)Gumpol, W.Y. Mastery of Sixteen Tenses/ W.Y. Gumpol. Yogyakarta: Kanisius, 2002.
Lua MLA (8ú heag.)Gumpol, W.Y. Mastery of Sixteen Tenses/ W.Y. Gumpol. Yogyakarta: Kanisius, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.