This article is within the scope of WikiProject Germany, a collaborative effort to improve the coverage of Germany on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Several of the first 10 sites Google presented when I searched deny that Hitler was democratically elected. For example:
No, Hitler was not democratically elected. This is a disturbingly popular misconception that needs to be put to rest, badly. 
Myth: Democracy elected Hitler to power.
Fact: Hitler used backroom deals, not votes, to come to power. Huppi
Can we address these objections, in the current article? --Uncle Ed (talk) 16:01, 16 July 2016 (UTC)
This article is about a referendum on merging two offices, not an election. If you have reliable sources about the nature of the referendum, you are welcome to add them. I did some searching, but I can't find much to add. I have not found a source which suggests that the vote was a fraud. Most report the vote matter-of-factly. Heinrich August Winkler, Germany: The Long Road West, Volume II (1933–1990) (Oxford University Press, 2000), p. 39, says that the Nazis were displeased with the lower levels of support in 1934 as compared with the referendum of 1933. Srnec (talk) 20:05, 16 July 2016 (UTC)
Markus Urban, "The Self-Staging of a Plebiscitary Dictatorship: The NS-Regime Between 'Uniformed Reichstag', Referendum and Reichsparteitag", in Ralph Jessen and Hedwig Richter (eds.), Voting for Hitler and Stalin: Elections Under 20th Century Dictatorships (Campus Verlag, 2011), p. 43, states: "large-scale electoral fraud does not seem to have occurred in the Third Reich" and "results that were more than 5 per cent less than those achieved the previous year [were] interpreted by the regime as well as by observers hostile to the regime as a failure". Srnec (talk) 01:41, 20 August 2016 (UTC)