Weiss, C. H. (1972). Evaluation research: Methods for assessing program effectiveness. Prentice-Hall.
Chicago-referens (17:e uppl.)Weiss, Carol H. Evaluation Research: Methods for Assessing Program Effectiveness. Englewood Cliffs, NJ: Prentice-Hall, 1972.
MLA-referens (9:e uppl.)Weiss, Carol H. Evaluation Research: Methods for Assessing Program Effectiveness. Prentice-Hall, 1972.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.