APA (7th ed.) Citation

HALSEY, N. A. Recent Advances in Immunization. Pan American Health Organization.

Chicago Style (17th ed.) Citation

HALSEY, Neal A. Recent Advances in Immunization. Pan American Health Organization.

MLA (8th ed.) Citation

HALSEY, Neal A. Recent Advances in Immunization. Pan American Health Organization.

Warning: These citations may not always be 100% accurate.