Kenworthy, L. S. (1952). World horizons for teachers. Bureau of Publications, Teachers College, Columbia University.
Chicago-viite (17. p.)Kenworthy, Leonard Stout. World Horizons for Teachers. New York: Bureau of Publications, Teachers College, Columbia University, 1952.
MLA-viite (9. p.)Kenworthy, Leonard Stout. World Horizons for Teachers. Bureau of Publications, Teachers College, Columbia University, 1952.
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