APA aipamena

Umaña V., G. (1998). Characterization of some Golfo Dulce drainage basin rivers (Costa Rica).

Chicago Style aipamena

Umaña V., Gerardo. Characterization of Some Golfo Dulce Drainage Basin Rivers (Costa Rica). 1998.

MLA aipamena

Umaña V., Gerardo. Characterization of Some Golfo Dulce Drainage Basin Rivers (Costa Rica). 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.