National Museum. (2013). Declaration of the Guyangan cave system of Banton island, Romblon as an important cultural property. Manila Times.
Chicago-Zitierstil (17. Ausg.)National Museum. "Declaration of the Guyangan Cave System of Banton Island, Romblon as an Important Cultural Property." Manila Times 2013.
MLA-Zitierstil (9. Ausg.)National Museum. "Declaration of the Guyangan Cave System of Banton Island, Romblon as an Important Cultural Property." Manila Times, 2013.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.