Fourth generation evaluation /

Autor Guba, Egon G., 1924-2008, Lincoln, Yvonna S., 1944-
Vydáno 1989

Effective evaluation : improving the usefulness of evaluation results through responsive and naturalistic approaches /

Autor Guba, Egon G., 1924-2008, Lincoln, Yvonna S., 1944-
Vydáno 1981