Wangdahl, A. (1977). Types of face-to-face contact in combination with correspondence education: A survey of the literature. Dept. of Education, University of Lund.
芝加哥风格引文Wangdahl, Agneta. Types of Face-to-face Contact in Combination with Correspondence Education: A Survey of the Literature. Lund: Dept. of Education, University of Lund, 1977.
MLA引文Wangdahl, Agneta. Types of Face-to-face Contact in Combination with Correspondence Education: A Survey of the Literature. Dept. of Education, University of Lund, 1977.
警告：这些引文格式不一定是100％准确.