APA-viite (7. p.)
Carkhuff, R. R. (1974). How to help yourself: The art of program development. Human Resource Development Press.
Chicago-viite (17. p.)
Carkhuff, Robert R. How to Help Yourself: The Art of Program Development. Amherst, Massachusetts: Human Resource Development Press, 1974.
MLA-viite (9. p.)
Carkhuff, Robert R. How to Help Yourself: The Art of Program Development. Human Resource Development Press, 1974.
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