Kenworthy, L. S. (1952). World horizons for teachers. Bureau of Publications, Teachers College, Columbia University.
Citazione stile Chigago Style (17a edizione)Kenworthy, Leonard Stout. World Horizons for Teachers. New York: Bureau of Publications, Teachers College, Columbia University, 1952.
Citatione MLA (9a ed.)Kenworthy, Leonard Stout. World Horizons for Teachers. Bureau of Publications, Teachers College, Columbia University, 1952.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.