Altschud, J. W., & Witkin, B. R. (2000). From needs assessment to action: Transforming needs into solution strategies (First edition.). Sage Publications, Inc..
Lua i Stíl Chicago (17ú heag.)Altschud, James W., agus Belle Ruth Witkin. From Needs Assessment to Action: Transforming Needs into Solution Strategies. First edition. California: Sage Publications, Inc., 2000.
Lua MLA (8ú heag.)Altschud, James W., agus Belle Ruth Witkin. From Needs Assessment to Action: Transforming Needs into Solution Strategies. First edition. Sage Publications, Inc., 2000.
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