Sancez Valladares, M. Carta dirigida al Senor D. Raphael maria de Aguilar, sobre el volcan de Albay [microform]. Photoduplication Service, University of the Philippines Library.
Cita Chicago (17th ed.)Sancez Valladares, Manuel. Carta Dirigida Al Senor D. Raphael Maria De Aguilar, Sobre El Volcan De Albay [microform]. Quezon City: Photoduplication Service, University of the Philippines Library.
Cita MLA (9th ed.)Sancez Valladares, Manuel. Carta Dirigida Al Senor D. Raphael Maria De Aguilar, Sobre El Volcan De Albay [microform]. Photoduplication Service, University of the Philippines Library.
Atenció: Aquestes cites poden no estar 100% correctes.