APA (7th ed.) Zitazioa

(1980). Guidelines for volunteer participation in childhood immunization programs.

Chicago Style (17th ed.) Zitazioa

Guidelines for Volunteer Participation in Childhood Immunization Programs. 1980.

MLA (9th ed.) Zitazioa

Guidelines for Volunteer Participation in Childhood Immunization Programs. 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.