Elsdon, K. T. (2003). Crisis of opportunity: Perspectives on adult education and humanism. NIACE.
芝加哥风格引文Elsdon, Konrad Theodore. Crisis of Opportunity: Perspectives on Adult Education and Humanism. Leicester: NIACE, 2003.
MLA引文Elsdon, Konrad Theodore. Crisis of Opportunity: Perspectives on Adult Education and Humanism. NIACE, 2003.
警告：这些引文格式不一定是100％准确.