Zerrudo, E. B., & Pama, H. O. (2022). The Vigan heritage charter: Toward a value-based interdisciplinary approach to heritage development. The Vigan heritage charter..
Lua i Stíl Chicago (17ú heag.)Zerrudo, Eric B., agus Hermel O. Pama. "The Vigan Heritage Charter: Toward a Value-based Interdisciplinary Approach to Heritage Development." The Vigan Heritage Charter. 2022.
Lua MLA (9ú heag.)Zerrudo, Eric B., agus Hermel O. Pama. "The Vigan Heritage Charter: Toward a Value-based Interdisciplinary Approach to Heritage Development." The Vigan Heritage Charter., 2022.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.