The scales can be found here: http://paulspector.com/scales/
Conditions for use are here: http://paulspector.com/scales/
Hackman‚ J. R.‚ & Oldham‚ G. R. (1975). Development of the job diagnostic survey. Journal of Applied Psychology‚ 60‚ 259-270.
Spector‚ P. E.‚ & Fox‚ S. (2003). Reducing subjectivity in the assessment of the job environment: Development of the factual autonomy scale‚ FAS. Journal of Organizational Behavior‚ 24‚ 417-432.