APA (7th ed.) Citation

(1997). Dengue Haemorrhagic Fever (2.ed.). World Health Organization.

Chicago Style (17th ed.) Citation

Dengue Haemorrhagic Fever. 2.ed. Ginebra: World Health Organization, 1997.

MLA (9th ed.) Citation

Dengue Haemorrhagic Fever. 2.ed. World Health Organization, 1997.