See HillJohn G., “Cost Analysis of Social Work Service,” in Social Work Research, PolanskyNorman A. (ed.), University of Chicago Press, Chicago, 1960, pp. 223–46.
2.
See HillJohn G., OrmsbyRalph, and McCurdyWilliam B., Time Analysis Manual, Family Service Association of America, New York, 1962, and William B. McCurdy, Interim Cost Analysis Manual with Procedures for Processing Time and Cost Data, Family Service Association of America, New York, 1964.
3.
See HeilandRobert E., and RichardsonWallace T., Work Sampling, McGraw-Hill Book Co., New York, 1957.