LINK, M. (1981). Outdoor education: A manual for teaching in nature's classroom. Prentice-Hall.
Citace podle Chicago (17th ed.)LINK, Michael. Outdoor Education: A Manual for Teaching in Nature's Classroom. New Jersey: Prentice-Hall, 1981.
Citace podle MLA (9th ed.)LINK, Michael. Outdoor Education: A Manual for Teaching in Nature's Classroom. Prentice-Hall, 1981.
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