Cita APA (7th ed.)

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.].

Cita Chicago (17th ed.)

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.

Cita MLA (9th ed.)

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.