Laquian, A., & Laquian, E. (1998). Joseph Ejercito "ERAP" Estrada: The centennial president. Institute of Asian Research, University of British Columbia.
Lua i Stíl Chicago (17ú heag.)Laquian, Aprodicio, agus Eleanor Laquian. Joseph Ejercito "ERAP" Estrada: The Centennial President. Vancouver, BC: Institute of Asian Research, University of British Columbia, 1998.
Lua MLA (9ú heag.)Laquian, Aprodicio, agus Eleanor Laquian. Joseph Ejercito "ERAP" Estrada: The Centennial President. Institute of Asian Research, University of British Columbia, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.