APA Citation

(1991). Report of the twenty first session London, 18-22 february, 1991. [s.l.]: World Health Organization.

Chicago Style Citation

Report of the Twenty First Session London, 18-22 February, 1991. [s.l.]: World Health Organization, 1991.

MLA Citation

Report of the Twenty First Session London, 18-22 February, 1991. [s.l.]: World Health Organization, 1991.

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