Stecher, B. M., Davis, W. A., & Morris, L. L. (1987). How to focus an evaluation. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Stecher, Brian M., W. Alan Davis, agus Lynn Lyons Morris. How to Focus an Evaluation. Newbury Park, Calif: Sage Publications, 1987.
Lua MLA (9ú heag.)Stecher, Brian M., et al. How to Focus an Evaluation. Sage Publications, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.