World Health Organization. (1998). Health workers manual on family planning options (Second.). World Health Organization.
芝加哥风格引文World Health Organization. Health Workers Manual on Family Planning Options. Second. Geneva: World Health Organization, 1998.
MLA引文World Health Organization. Health Workers Manual on Family Planning Options. Second. World Health Organization, 1998.
警告：这些引文格式不一定是100％准确.