APA aipamena

Varela, A. (2011). General aspects of Irazú Volcano National Park.

Chicago Style aipamena

Varela, Alejandra. General Aspects of Irazú Volcano National Park. 2011.

MLA aipamena

Varela, Alejandra. General Aspects of Irazú Volcano National Park. 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.