Bontes, A. V., & Santos, E. P. Poblacion map of Legaspi City, Province of Albay. s.n.
Chicagoスタイル(17版)引用形式Bontes, Arturo V., , Ernesto P. Santos. Poblacion Map of Legaspi City, Province of Albay. [S.l: s.n.
MLA(9版)引用形式Bontes, Arturo V., , Ernesto P. Santos. Poblacion Map of Legaspi City, Province of Albay. s.n.
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