APA

Edmunds W. a., Gay N., Gay J. & Birsson M. (1999). The cost-effectivenss of Haemophilus influenzae Type b (Hib), hepatitis B virus (HBV) and measles vaccination in developing countries : a preliminary report to WHO, December 1999. London: PHLS Communicable Disease Surveillance Centre.

Chicago

Edmunds W.J....[et al.], Gay N.J, Gay J.R and Birsson M. 1999. The cost-effectivenss of Haemophilus influenzae Type b (Hib), hepatitis B virus (HBV) and measles vaccination in developing countries : a preliminary report to WHO, December 1999. London: PHLS Communicable Disease Surveillance Centre.

Harvard

Edmunds W. a., Gay N., Gay J. and Birsson M. (1999). The cost-effectivenss of Haemophilus influenzae Type b (Hib), hepatitis B virus (HBV) and measles vaccination in developing countries : a preliminary report to WHO, December 1999. London: PHLS Communicable Disease Surveillance Centre.

MLA

Edmunds W.J....[et al.], Gay N.J, Gay J.R and Birsson M. The cost-effectivenss of Haemophilus influenzae Type b (Hib), hepatitis B virus (HBV) and measles vaccination in developing countries : a preliminary report to WHO, December 1999. London: PHLS Communicable Disease Surveillance Centre. 1999.