World Health Organization. (1971). Family planning in health services; report of a WHO expert committee. s.n.
芝加哥风格引文World Health Organization. Family Planning in Health Services; Report of a WHO Expert Committee. Geneva: s.n, 1971.
MLA引文World Health Organization. Family Planning in Health Services; Report of a WHO Expert Committee. s.n, 1971.
警告：这些引文格式不一定是100％准确.