Stecher, B. M., Davis, W. A., & Morris, L. L. (1987). How to focus an evaluation. Sage Publications.
Citazione stile Chigago Style (17a edizione)Stecher, Brian M., W. Alan Davis, e Lynn Lyons Morris. How to Focus an Evaluation. Newbury Park, Calif: Sage Publications, 1987.
Citatione MLA (9a ed.)Stecher, Brian M., et al. How to Focus an Evaluation. Sage Publications, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.