For a long time, I used Altemeyer's RWA questionnaire, although in recent years I have switched to the one developed by Funke (2005) - namely because the latter is briefer, and has better psychometric properties than either Altemeyer's RWA scale or the F-Scale. I have found from some pilot data that findings obtained with Funke's scale largely replicate findings I have obtained using Altemeyer's scale (plus I have the benefit of actually directly measuring authoritarian aggression, submission, and conventionalism).
Altemeyer, B. (1988). Enemies of freedom: Understanding right-wing authoritarianism. San Francisco: Jossey-Bass.Altemeyer, B. (1996). The authoritarian specter. Cambridge, MA: Harvard University Press.
Funke, F. (2005). The dimensionality of right-wing authoritarianism: Lessons from the dilemma between theory and measurement. Political Psychology, 26, 195-218.