Sitasi

APA Format

World Health Organization . (1991). Yellow fever vaccination centres for international travel : situations on January 1991. Geneva : WHO

MLA Format

World Health Organization . Yellow fever vaccination centres for international travel : situations on January 1991. Geneva : WHO, 1991

Australian/Harvard Format

World Health Organization . 1991. Yellow fever vaccination centres for international travel : situations on January 1991. WHO, Geneva

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