Dery, L. C. (1991). Bikol history in Bikol folklore: Documentary evidence of five Bikol oral tradition. The Journal of History.
Citace podle Chicago (17th ed.)Dery, Luis Camara. "Bikol History in Bikol Folklore: Documentary Evidence of Five Bikol Oral Tradition." The Journal of History 1991.
Citace podle MLA (9th ed.)Dery, Luis Camara. "Bikol History in Bikol Folklore: Documentary Evidence of Five Bikol Oral Tradition." The Journal of History, 1991.
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