COnyango & Tolba Mostafa. (1992). The World environment 1972-1992: Two decades of challenge. Chapman & Hall.
芝加哥风格引文COnyango 与 Tolba Mostafa. The World Environment 1972-1992: Two Decades of Challenge. London: Chapman & Hall, 1992.
MLA引文COnyango 与 Tolba Mostafa. The World Environment 1972-1992: Two Decades of Challenge. Chapman & Hall, 1992.
警告：这些引文格式不一定是100％准确.