APA aipamena

Rosero Bixby, L. (2008). The exceptionally high life expectancy of Costa Rican nonagenarians.

Chicago Style aipamena

Rosero Bixby, Luis. The Exceptionally High Life Expectancy of Costa Rican Nonagenarians. 2008.

MLA aipamena

Rosero Bixby, Luis. The Exceptionally High Life Expectancy of Costa Rican Nonagenarians. 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.