APA
World Health Organization, . (1989). Manual of details of tests required on final vaccines used in the who expanded programme of immunization. Geneva: World Health Oraganization.
Chicago
World Health Organization, . 1989. Manual of details of tests required on final vaccines used in the who expanded programme of immunization. Geneva: World Health Oraganization.
Harvard
World Health Organization, . (1989). Manual of details of tests required on final vaccines used in the who expanded programme of immunization. Geneva: World Health Oraganization.
MLA
World Health Organization, . Manual of details of tests required on final vaccines used in the who expanded programme of immunization. Geneva: World Health Oraganization. 1989.