APA aipamena

World Health Organization. (1998). Health workers manual on family planning options (Second.). World Health Organization.

Chicago Style aipamena

World Health Organization. Health Workers Manual on Family Planning Options. Second. Geneva: World Health Organization, 1998.

MLA aipamena

World Health Organization. Health Workers Manual on Family Planning Options. Second. World Health Organization, 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.