Eco, C. (1969). A survey of the dialect geography in the six towns of Sorsogon: Donsol, Sorsogon, Bacon, Gubat, Casiguran and Sta. Magdalena. s.n.].
Chicagoスタイル(17版)引用形式Eco, Caridad. A Survey of the Dialect Geography in the Six Towns of Sorsogon: Donsol, Sorsogon, Bacon, Gubat, Casiguran and Sta. Magdalena. [Quezon City: s.n.], 1969.
MLA(9版)引用形式Eco, Caridad. A Survey of the Dialect Geography in the Six Towns of Sorsogon: Donsol, Sorsogon, Bacon, Gubat, Casiguran and Sta. Magdalena. s.n.], 1969.
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