APA-viite (7. p.)

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-viite (17. p.)

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-viite (9. p.)

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.