World Health Organization. (1991). The Work of WHO in the Eastern Mediterranean Region: Annual Report of the Regional Director. World Health Organization Regional Office for the Eastern Mediterranean.
芝加哥风格引文World Health Organization. The Work of WHO in the Eastern Mediterranean Region: Annual Report of the Regional Director. Egypt: World Health Organization Regional Office for the Eastern Mediterranean, 1991.
MLA引文World Health Organization. The Work of WHO in the Eastern Mediterranean Region: Annual Report of the Regional Director. World Health Organization Regional Office for the Eastern Mediterranean, 1991.
警告：这些引文格式不一定是100％准确.