1. Beck, C. M., Rawlins, R. P. & Williams, S. R. (1984). Mental health psychiatric nursing. A holistic life-cycle approach. St. Louis: Mosby.
2. Clark, P. (1972). Action research and organizational change. London: Harper & Row.
3. Heikkinen, E., Arajarvi, R-L., Jylha, M., Koskinen, S., Pekurinen, M. & Pohjolainen, P. (1981). Elakelaiset Tampereella [The aged of Tampere]. Kansanterveystieteen julkaisuja, 65/81, 7- 153.