Cita APA (7th ed.)
(1987). PERTUSSIS VACCINATION: IS THE POLICY RIGHT?
Cita Chicago (17th ed.)
PERTUSSIS VACCINATION: IS THE POLICY RIGHT? 1987.
Cita MLA (9th ed.)
PERTUSSIS VACCINATION: IS THE POLICY RIGHT? 1987.
Atenció: Aquestes cites poden no estar 100% correctes.