(1981). Metaphors for evaluation: Sources of new methods. Sage.
Citazione stile Chigago Style (17a edizione)Metaphors for Evaluation: Sources of New Methods. Beverly Hills: Sage, 1981.
Citatione MLA (9a ed.)Metaphors for Evaluation: Sources of New Methods. Sage, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.