World Health Organization. (1971). Family planning in health services; report of a WHO expert committee. s.n.
Cita Chicago (17th ed.)World Health Organization. Family Planning in Health Services; Report of a WHO Expert Committee. Geneva: s.n, 1971.
Cita MLA (9th ed.)World Health Organization. Family Planning in Health Services; Report of a WHO Expert Committee. s.n, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.