APA (7th ed.) Zitazioa

Health News Naturally. Lowell House / Keats Publishing.

Chicago Style (17th ed.) Zitazioa

Health News Naturally. Lowell House / Keats Publishing.

MLA (9th ed.) Zitazioa

Health News Naturally. Lowell House / Keats Publishing.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.