Calleja, D. O. (2000). Epidemya, mudflow: Mayon, may 2 panganib. Kabayan.
Chicago-čujuhus (17. p.)Calleja, Danny O. "Epidemya, Mudflow: Mayon, May 2 Panganib." Kabayan 2000.
MLA-čujuhus (9. p.)Calleja, Danny O. "Epidemya, Mudflow: Mayon, May 2 Panganib." Kabayan, 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.