United Nations. Economic and Social Commission for Asia and the Pacific. (1976). Population of Sri Lanka. ESCAP.
芝加哥风格引文United Nations. Economic and Social Commission for Asia and the Pacific. Population of Sri Lanka. Bangkok: ESCAP, 1976.
MLA引文United Nations. Economic and Social Commission for Asia and the Pacific. Population of Sri Lanka. ESCAP, 1976.
警告：这些引文格式不一定是100％准确.