COOMBS, P. H. (1987). Cost Analysis In Education A Tool For Policy And Planning Philip H. Coombs And Jacques Hallak. The Johns Hopkins University.
Lua i Stíl Chicago (17ú heag.)COOMBS, Philip H. Cost Analysis In Education A Tool For Policy And Planning Philip H. Coombs And Jacques Hallak. The Johns Hopkins University, 1987.
Lua MLA (8ú heag.)COOMBS, Philip H. Cost Analysis In Education A Tool For Policy And Planning Philip H. Coombs And Jacques Hallak. The Johns Hopkins University, 1987.
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