Man, F. F. D. 598/117: Artikel van Hendrik de Man "Labor's Challenge to Education", in: The New Republic (New York),(XXVI), 2/3/1931, (326), pp.16-18.
Lua i Stíl Chicago (17ú heag.)Man, Fonds Familie De. 598/117: Artikel Van Hendrik De Man "Labor's Challenge to Education", in: The New Republic (New York),(XXVI), 2/3/1931, (326), Pp.16-18.
Lua MLA (8ú heag.)Man, Fonds Familie De. 598/117: Artikel Van Hendrik De Man "Labor's Challenge to Education", in: The New Republic (New York),(XXVI), 2/3/1931, (326), Pp.16-18.
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