2025年1月2日 · “biyaya”, in Pambansang Diksiyonaryo | Diksiyonaryo.ph, Manila, 2018; Rosalio Serrano (1854) Diccionario de terminos comunes tagalo-castellano (in Spanish), page 19; Zorc, David Paul (1979–1983) Core Etymological Dictionary of Filipino: Part 1, page 52