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.
Citace podle Chicago (17th ed.)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.
Citace podle MLA (8th ed.)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.
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