APA
World Health Organization, . (1988). Cytological screening in the control of cervical cancer : technical guidelines. World Health Organization, Geneva: .
Chicago
World Health Organization, . 1988. Cytological screening in the control of cervical cancer : technical guidelines. World Health Organization, Geneva: .
Harvard
World Health Organization, . (1988). Cytological screening in the control of cervical cancer : technical guidelines. World Health Organization, Geneva: .
MLA
World Health Organization, . Cytological screening in the control of cervical cancer : technical guidelines. World Health Organization, Geneva: . 1988.