Del Prado, M. G. (1960). "A short history of the district of Albay". s.n.
Chicagoスタイル(17版)引用形式Del Prado, Mariano Goyena. "A Short History of the District of Albay". s.l: s.n, 1960.
MLA(8版)引用形式Del Prado, Mariano Goyena. "A Short History of the District of Albay". s.n, 1960.
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